Cool Mike!! Glad you liked it, definitely reminds me of all the fun times we used to have with those old Prather tunnels. I think this one goes as fast as the big one I had. It's crazy how fast the electrics are these days.
This is probably a flaw in the hull design as mine does it to. It will jump and spin out if turned to tight and fast. Some of the older tunnel hull designs had a turn fin mounted under the boat on the inside of the tunnel, right about where the cg is. You might try experimenting with that to see how it works. Cut the leading edge at about 45 degrees and bend the fin to the inside of the hull at about 10-15 degrees. It should stick down about 1 1/2 inches below the bottom of the hull.
THAT THING IS CRAZY FRANK …. Every time I see you ripping these boats it makes me wanna get one this summer I know a couple guys that have nitro boats but don’t come close to the speeds this thing is doing
I ordered the same boat a few days ago from Hobbyking. I'm planin to upgrade mine aswell. You gave me some good ideas, thanks. Also your videos helped me with some other boats I have. Good job Humphrey. Maybe I shoul upload some of my videos to.
@FlyGuy12000 the tug boat tows a string with some fishing bobbers attached at the end. You just drive out to the flipped boat and circle around it until the bobbers catch the rudder of the flipped boat, then tow it back to shore.
The 1450kv motor is very popular and always sells out. HobbyKing will restock this one but no telling when they will. If you want one you should sign in and submit for e-mail notification when it is restocked. As for a replacement you can try the Turnigy 500 H3126 1600KV Brushless outrunner. It is rated at 1500watts, is in stock, and works great with Octura X442 or X642 on 4s and 5s LiPo Batteries. For 6s run with Octura X440 prop.
@PornstaR16L I went with the Fullers unit because it is molded as one piece which makes it much stronger at the bottom where the lower bushing screws in. I have had two piece ones like the K&B outboard break apart after a while. If you are only running 4s either type would hold up fine.
@roadstar499 that will help keep the battery cooler but will push more power through the esc and motor which will make them work harder and run warmer. The esc is 120amp but should be 180amp with the power of this setup.
I agree the stock outboard drive breakes too easy. I have replaced mine with the Fullers Fast Electric one piece Lower leg unit and that's whats running in the video. Handles 6s with no problem. There are links in the video information bar below the video. Ray Fuller is very helpful and will answer any questions about his outboard drive system.
The complete lower drive was replaced because the stock one can't take this much power without breaking it. It is designed for 28mm size motors running on 3 cells.
If you want to water cool the motor you will need to switch to a brushless inrunner like the Turnigy SK3 3659-1600kv or Turnigy SK3 3659-1900kv motor. Use the 1600kv for 6s and the 1900kv for 4s or 5s setups. These are awesome motors from hobbyking.
I use the liquid plastic as it can easily be removed if nessesary.I've heard of other people using epoxy, liquid tape, electrical Corrosion x, and electrical grade silicone. Make sure it is electrical grade or it can damage the electronics. I haven't tried any of these other ways so can't tell you how well they work. I can tell you I'm happy with the liquid plastic as it works great. Warning, most of these will void any manufactrure warranty if it cannot be removed before sending it back.
hi frank, i bought a hornet after watching this vid, fitted same esc & ran the boat on the stock motor (died on 4s) fitted leopard 2860 2040kv & 1.4 x 37prop. still running this setup on 5s 45c 5000!! cant believe the flex hasnt broken yet! ( video "hobbyking hornet f1 5s" ) i have a proboat outboard that i have fitted your super edf 3659 1900 motor to...442 prop, 4mm flex & i machined it to replace the prop bush with 60,000 rev capable bearings (not yet on the boat) will post vid when done : )
@catamaranman333 on 6s I used an APC 6.5 x 6.5 sport prop and on 5s we use 7x6 or 7x8 sport props. All these props are for fuel motors and are thicker and stronger than the electric props. On 3s you could probably turn a 10 or 11 inch prop.
@catamaranman333 I'm not quite sure what you mean by traditional boat shaft. Boats usually use a solid shaft, flex shaft or wire drive. Any of these would work as you just cut them to the length that you need. Do a search for these and you will see what I mean.
I personally think the Fullers unit is better than the K&B one. Its lighter and stronger because it's one piece design and does holds up to 6s no problem. You just have to remember to keep the flex shaft lubed and it will last a long time.
@aussieboy108 this setup may be too much for the Sprint F3 outboard drive as it is fitted with a 28mm motor in stock configuration. The motor I used had a 5mm shaft and the Sprint F3 outboard takes a 3.17mm motor shaft. You could probably modify it to fit but I don't think it would hold up to this motor on 6s power.
+RCFF-DiehardRC I have a turnigy marine esc too. I have my cooling setup where the esc is before the motor and found out it was cutting out like yours so I brought it back to check. I brought my temp laser gun and saw it was like 165F and motor was like 140F. Batteries were low like 72F. I was running slow because it was my 3rd time. If the esc never got to the point where it went to overheat mode you probably would have set your lipos on fire. Next run I'm going to be running higher RPM but cooling should be better but I should keep an eye on the lipo temps after.
Water has not not been a problem. If it gets wet just ring it out with a blip of the thottle then keep on running. Just make sure to spray it down with som kind of water repellent like WD40 after you finis running for the day to make sure the water doesn't cause corrosion etc.
@RCJETJUNKIE don't fight it!!! But be warned it's addictive. If you get one they will multiply on you lol! Running these fast boats is the same adrenaline rush you get with the speed planes.
i also noticed in your videos that the motor you used did have cooling issues, could you you please tell me from the hobbyking website, what would be the best water cooled motor to use running 6s, thanks so much, your reviews are awesome, keep up the good work!
@JANCSI1978 I don't know where you can get parts for the stock drive and I don't think it's worth the trouble to fix it as it will most likely break again. I suggest replacing the complete drive with a Fullers drive unit. Please have a look at the link to Fullers Fast Electric in the video information bar below the video. Ray Fuller is very helpful and will answer any questions you may have about his outboard drive system.
@DiehardRCaddicts I've been playing with air-powered hydrofoils for about a year now. I use heli blades for the actual foils and in some cases use a gyro to keep the thing level. The nice thing is you don't get the pitchpoles and the "speed limit" goes up. My runs haven't been tested but I estimate top speed pretty close to 50MPH. I've been using airplane motors so far but been thinking of switching to water drive. How hard would it be to extend a traditional boat shaft to 6"+?
Just going to a 40c from a 20c will solve all the parts to run cooler?? or just the batteries?? which esc was in that? the turnigy 180?/seaking 180? thanks
Please tell me how do you waterproof your ESC ? In my original Hobby King Hornet mine got wet & fried itself. I'm sure there's 10 ways to waterproof them & I'd like to know a few easy & effective ways other than dipping it in liquid plastic stuff that some of you guys in the US use. I can't find this goo in the land of Oz (Australia) & there must be better ways.
Hello this boat is sold t-il with modification that had brought to you? Or alor has how much revien this boat with modification has to bring? I am interessé thank you
Hello, my boat is arrived and my shaft is broken in the first day, tell me please where can we find a shaft witch is goog for this boat? I saw that you alsow changed
Hi Frank, I've copied your mods, except I got the large aluminium leg. It went ok on 3s and is very quick on 6s. However the 5mm shaft has broken at the coupling on only the second speed run. I was using a 40mm aluminium propellor. The sales guy reckons 6s is way to much. What shaft are you using?
Good afternoon! One more question. Why you changed standard fastening for the engine? It doesn't maintain turns of that engine 3648-1450kv? Or there is other reason?
Hello! I want to order the engine 3648-1450kv, but it long isn't present. Advise than it can be replaced with hobbyking. That it wouldn't be heated and there were similar characteristics.
Please click on the video information bar below the video. There you will find links to the motor, esc and all the other parts used to do the mods to the boat.
Hi mate, after watching your reviews on the hornet tunnel boat, i am in the process of doing the the motor modification so i can run 6s, one problem i have is i am unable to get a K&B Adjustable 3.5 outboard mount: sent to australia as no one wants to send one ( not sure why) do you think that the the fuller motor mount will work fine? its on there ebay store.
I'm guesing you mean Propeller. I used an Qctura X442 propeller bought at the local hobby shop. You can search the internet to buy this. HobbyKing does not have them.
yeah i did buy the fuller lower leg, i just cant get the transom mounting kit like your one, fuller sells one for there lower leg, do you think that will work just as well?
Frank, when you say "K&B Adjustable 3.5 outboard mount" do you mean a mount that the motor is mounted to or the lower unit? I cannot locate this "Adjustable Mount". There are 3 different 3.5 lower units.
@catamaranman333 after I got home I found out why the boat shut down at the end. The outboard drive shaft bearing was binding from me forgetting to lubricate it before running the boat. So I would have to say there is still more speed in it. I'll need to get it back out now that I've had everything apart and it's bind free again. There's always a need for more speed!!!
Hi mate, do you have the part number for the Adjustable outboard mount? thanks mate! mines almost finished and its just coming in to summer in australia, cant wait to freak some people out with this boat.
Please watch the first two videos on this boat "Hornet F1 Tunnel hull mods and test runs " and "Hornet F1 Tunnel Hull initial 6 cell test runs". You will see the mods there.
hey just wondering would it be alright to do the same setup in a 30.5' tunnel and im thinking of using the Sprint F3 Tunnel outboard setup on it and changing everything around and running the exact same set up as you including changing the motor to the turnigy 3848-1450kv to run it on 6s do you reckon the outboard unit would handle the set up? cheers
So, can we call this a 50MPH boat or you got some more tricks up your sleeve, Frank? Can't really complain about 50MPH on the water! Thats faster than most of my airplanes! XD
do you think this motor mount would work? Dubro 3.5cc Adjustable Outboard Motor Mount google it and let me know when you have a spare minute, thanks mate
The link in the video info bar to Fullers Fast Electric where I got it does not work anymore. The outboard lower leg is an REK but I did a search and could not find them for sale anywhere. They might not be made anymore. Check offshoreelectrics.com for other outboard drives. I know they sell a few different ones.
Commycrua, I still have the boat but don't run it anymore because the hull has too many stress cracks. I stripped it down to put the parts in my Aeromarine Predator. Here are some videos of it running on 4s and 5s. 4s test runs ua-cam.com/video/1ImzXVk5_ZE/v-deo.html 5s test runs ua-cam.com/video/eNBHvK6SgyY/v-deo.html
RCFF-DiehardRC cool, any chance you have some pictures if the outboard setup or if you could take some? My friend just bought the same boat and is looking at buying the same outboard. Thanks
Nice boat Humphrey. Kinda reminds me of the old Prathers we used to run years ago. And 50 mph is pretty crazy. Nice build.
Cool Mike!! Glad you liked it, definitely reminds me of all the fun times we used to have with those old Prather tunnels. I think this one goes as fast as the big one I had. It's crazy how fast the electrics are these days.
The motor is outside the hull of the boat in the open air so don't usually have a problem with it over heating as long as it's not too hot outside.
This is probably a flaw in the hull design as mine does it to. It will jump and spin out if turned to tight and fast. Some of the older tunnel hull designs had a turn fin mounted under the boat on the inside of the tunnel, right about where the cg is. You might try experimenting with that to see how it works. Cut the leading edge at about 45 degrees and bend the fin to the inside of the hull at about 10-15 degrees. It should stick down about 1 1/2 inches below the bottom of the hull.
THAT THING IS CRAZY FRANK …. Every time I see you ripping these boats it makes me wanna get one this summer I know a couple guys that have nitro boats but don’t come close to the speeds this thing is doing
I ordered the same boat a few days ago from Hobbyking. I'm planin to upgrade mine aswell. You gave me some good ideas, thanks. Also your videos helped me with some other boats I have. Good job Humphrey. Maybe I shoul upload some of my videos to.
@FlyGuy12000 the tug boat tows a string with some fishing bobbers attached at the end. You just drive out to the flipped boat and circle around it until the bobbers catch the rudder of the flipped boat, then tow it back to shore.
The 1450kv motor is very popular and always sells out. HobbyKing will restock this one but no telling when they will. If you want one you should sign in and submit for e-mail notification when it is restocked. As for a replacement you can try the Turnigy 500 H3126 1600KV Brushless outrunner. It is rated at 1500watts, is in stock, and works great with Octura X442 or X642 on 4s and 5s LiPo Batteries. For 6s run with Octura X440 prop.
@PornstaR16L I went with the Fullers unit because it is molded as one piece which makes it much stronger at the bottom where the lower bushing screws in. I have had two piece ones like the K&B outboard break apart after a while. If you are only running 4s either type would hold up fine.
@roadstar499 that will help keep the battery cooler but will push more power through the esc and motor which will make them work harder and run warmer. The esc is 120amp but should be 180amp with the power of this setup.
I agree the stock outboard drive breakes too easy. I have replaced mine with the Fullers Fast Electric one piece Lower leg unit and that's whats running in the video. Handles 6s with no problem. There are links in the video information bar below the video. Ray Fuller is very helpful and will answer any questions about his outboard drive system.
Can anyone still get this lower leg?? Mines been a shelf sitter for years please help.
The complete lower drive was replaced because the stock one can't take this much power without breaking it. It is designed for 28mm size motors running on 3 cells.
If you want to water cool the motor you will need to switch to a brushless inrunner like the Turnigy SK3 3659-1600kv or Turnigy SK3 3659-1900kv motor. Use the 1600kv for 6s and the 1900kv for 4s or 5s setups. These are awesome motors from hobbyking.
I use the liquid plastic as it can easily be removed if nessesary.I've heard of other people using epoxy, liquid tape, electrical Corrosion x, and electrical grade silicone. Make sure it is electrical grade or it can damage the electronics. I haven't tried any of these other ways so can't tell you how well they work. I can tell you I'm happy with the liquid plastic as it works great. Warning, most of these will void any manufactrure warranty if it cannot be removed before sending it back.
hi frank, i bought a hornet after watching this vid, fitted same esc & ran the boat on the stock motor (died on 4s) fitted leopard 2860 2040kv & 1.4 x 37prop. still running this setup on 5s 45c 5000!! cant believe the flex hasnt broken yet! ( video "hobbyking hornet f1 5s" ) i have a proboat outboard that i have fitted your super edf 3659 1900 motor to...442 prop, 4mm flex & i machined it to replace the prop bush with 60,000 rev capable bearings (not yet on the boat) will post vid when done : )
Yeah, freshwater usually doesn't hurt brushless motors, but good luck with doing that on the saltwater I live on!
Always worth checking the battery connectors as they can get hot too. Looks like you are using xt90s
Thanks for the reply cannot wait to put this together
Not sure haven't seen this mount but if it bolts on and is adjustable up and down and the prop angle is adjustable too it should work fine.
Cool job Frank,thinks for great videos look forward to all of them.Dan
@catamaranman333 on 6s I used an APC 6.5 x 6.5 sport prop and on 5s we use 7x6 or 7x8 sport props. All these props are for fuel motors and are thicker and stronger than the electric props. On 3s you could probably turn a 10 or 11 inch prop.
i think a 50 mph tugboat would be an interesting next project. if it flips over, then you could use the tunnel hull to tow it in
@catamaranman333 I'm not quite sure what you mean by traditional boat shaft. Boats usually use a solid shaft, flex shaft or wire drive. Any of these would work as you just cut them to the length that you need. Do a search for these and you will see what I mean.
I personally think the Fullers unit is better than the K&B one. Its lighter and stronger because it's one piece design and does holds up to 6s no problem. You just have to remember to keep the flex shaft lubed and it will last a long time.
@aussieboy108 this setup may be too much for the Sprint F3 outboard drive as it is fitted with a 28mm motor in stock configuration. The motor I used had a 5mm shaft and the Sprint F3 outboard takes a 3.17mm motor shaft. You could probably modify it to fit but I don't think it would hold up to this motor on 6s power.
ok thanks
DiehardRCaddicts Did you put some weight on front of this boat? sometimes the prop can't catch the water and pushes air not a water, any advice?
+RCFF-DiehardRC I have a turnigy marine esc too. I have my cooling setup where the esc is before the motor and found out it was cutting out like yours so I brought it back to check. I brought my temp laser gun and saw it was like 165F and motor was like 140F. Batteries were low like 72F. I was running slow because it was my 3rd time.
If the esc never got to the point where it went to overheat mode you probably would have set your lipos on fire.
Next run I'm going to be running higher RPM but cooling should be better but I should keep an eye on the lipo temps after.
Water has not not been a problem. If it gets wet just ring it out with a blip of the thottle then keep on running. Just make sure to spray it down with som kind of water repellent like WD40 after you finis running for the day to make sure the water doesn't cause corrosion etc.
Yes the Dubro 3.5cc adjustable outboard mount will work but it is not as strong as the Prather mount.
Those should work fine if they will fit in the boat. It was a pretty tight fit getting the 4000mAh batteries in mine.
@RCJETJUNKIE don't fight it!!! But be warned it's addictive. If you get one they will multiply on you lol! Running these fast boats is the same adrenaline rush you get with the speed planes.
i also noticed in your videos that the motor you used did have cooling issues, could you you please tell me from the hobbyking website, what would be the best water cooled motor to use running 6s, thanks so much, your reviews are awesome, keep up the good work!
@JANCSI1978 I don't know where you can get parts for the stock drive and I don't think it's worth the trouble to fix it as it will most likely break again. I suggest replacing the complete drive with a Fullers drive unit. Please have a look at the link to Fullers Fast Electric in the video information bar below the video. Ray Fuller is very helpful and will answer any questions you may have about his outboard drive system.
That's correct I used two 4000mAh 30c 3s1p LiPo in series to get 6s1p.
Octura x442 prop on 6 cells would work with that Turnigy SK3 3659-1600kv inrunner motor.
@DiehardRCaddicts I've been playing with air-powered hydrofoils for about a year now. I use heli blades for the actual foils and in some cases use a gyro to keep the thing level. The nice thing is you don't get the pitchpoles and the "speed limit" goes up. My runs haven't been tested but I estimate top speed pretty close to 50MPH. I've been using airplane motors so far but been thinking of switching to water drive. How hard would it be to extend a traditional boat shaft to 6"+?
Just going to a 40c from a 20c will solve all the parts to run cooler?? or just the batteries?? which esc was in that? the turnigy 180?/seaking 180? thanks
Please tell me how do you waterproof your ESC ? In my original Hobby King Hornet mine got wet & fried itself. I'm sure there's 10 ways to waterproof them & I'd like to know a few easy & effective ways other than dipping it in liquid plastic stuff that some of you guys in the US use. I can't find this goo in the land of Oz (Australia) & there must be better ways.
Hi Frank,
What size (mAh) batteries are you using in this vid, and are they 2x3s or 6s1p ??
Thanks in advance.
Hello this boat is sold t-il with modification that had brought to you? Or alor has how much revien this boat with modification has to bring? I am interessé thank you
Hello, my boat is arrived and my shaft is broken in the first day, tell me please where can we find a shaft witch is goog for this boat? I saw that you alsow changed
Hi Frank, I've copied your mods, except I got the large aluminium leg. It went ok on 3s and is very quick on 6s. However the 5mm shaft has broken at the coupling on only the second speed run. I was using a 40mm aluminium propellor. The sales guy reckons 6s is way to much. What shaft are you using?
Also, what prop do you use for airplanes on the Turnigy 3648 on 6s? 7x5 is what they say but is that 3s or 6s?
im running this motor in my hydro on 5CELLS and it pull 160amps. im using a 190/200amp esc. you need a higher current speed controller.
@jaimesarabia it's an Octura X442 that's been detounged, sharpened,and balanced. You can find the video on how to do this on DieHardrcAddicts channel.
WoW fast reply, Thanks.
I already have some 5000 3s , would that get too heavy ?
hey is this motor ok to get wet or do you waterproof it? i notice its a plane motor is it ok to not be water cooled ?
Good afternoon! One more question. Why you changed standard fastening for the engine? It doesn't maintain turns of that engine 3648-1450kv? Or there is other reason?
Hello! I want to order the engine 3648-1450kv, but it long isn't present. Advise than it can be replaced with hobbyking. That it wouldn't be heated and there were similar characteristics.
Please click on the video information bar below the video. There you will find links to the motor, esc and all the other parts used to do the mods to the boat.
Hi mate, after watching your reviews on the hornet tunnel boat, i am in the process of doing the the motor modification so i can run 6s, one problem i have is i am unable to get a K&B Adjustable 3.5 outboard mount: sent to australia as no one wants to send one ( not sure why) do you think that the the fuller motor mount will work fine? its on there ebay store.
The fastest speed clock so far was from the 1st 6 cell testing video which was radar clocked at 51mph.
I'm guesing you mean Propeller. I used an Qctura X442 propeller bought at the local hobby shop. You can search the internet to buy this. HobbyKing does not have them.
yeah i did buy the fuller lower leg, i just cant get the transom mounting kit like your one, fuller sells one for there lower leg, do you think that will work just as well?
Frank, when you say "K&B Adjustable 3.5 outboard mount" do you mean a mount that the motor is mounted to or the lower unit? I cannot locate this "Adjustable Mount". There are 3 different 3.5 lower units.
***** here is a link mecoa.biz/shopdisplayproducts.asp?catalogid=2079
@catamaranman333 after I got home I found out why the boat shut down at the end. The outboard drive shaft bearing was binding from me forgetting to lubricate it before running the boat. So I would have to say there is still more speed in it. I'll need to get it back out now that I've had everything apart and it's bind free again. There's always a need for more speed!!!
Hello. If to put this Turnigy SK3 3659-1600kv inrunner motor. What for it are necessary props and the accumulator how many cells?
are you guys going to be making a giveaway for this boat?
Not sure what the part# is just do a search on for "Prather 3.5 Adjustable Outboard Motor Mount".
Yes, this is 6 cells in series.
i wont bother water cooling if the engine you used copes ok being air cooled?
Hello! I do your copy, tell me please what size you use the screw. There is this screw on hobbyking?
My motor is stuffed i am wondering what motor i could replace it with?
Hi mate, do you have the part number for the Adjustable outboard mount? thanks mate! mines almost finished and its just coming in to summer in australia, cant wait to freak some people out with this boat.
Please watch the first two videos on this boat "Hornet F1 Tunnel hull mods and test runs " and "Hornet F1 Tunnel Hull initial 6 cell test runs". You will see the mods there.
how long do you get before the motor you run over heats?
How does ur rescue boats rescue device work?
how much volt? how to fast is the boat..?
hey just wondering would it be alright to do the same setup in a 30.5' tunnel and im thinking of using the Sprint F3 Tunnel outboard setup on it and changing everything around and running the exact same set up as you including changing the motor to the turnigy 3848-1450kv to run it on 6s do you reckon the outboard unit would handle the set up? cheers
thank's DiehardRCaddicts
So, can we call this a 50MPH boat or you got some more tricks up your sleeve, Frank? Can't really complain about 50MPH on the water! Thats faster than most of my airplanes! XD
hey what's the top speed of that boat
do you think this motor mount would work?
Dubro 3.5cc Adjustable Outboard Motor Mount
google it and let me know when you have a spare minute, thanks mate
Hello, it is my boat with 3 cell li-po!
nanotech should be awesome on this boat
how did u setup the tow?
@AlexGuThEiL Fist. Yeah, that sounds like a Freudian slip.
What did you do to the outboard motor
I only had to shorten the 5mm shaft and bolt it onto the Fullers Fast Electric lower leg. Links are in the information bar below the video
This is a nice setup, tho I am going to assemble mine with 4S setup and 2300W watercooled motor, and see how it runs :D
+Guntars Lācītis 2300W burst?
we have the same geese in norway
What kv motor esc are you running and voltage
Turnigy 3648 1450kv motor, Turnigy Marine 120A esc, running on 6 cells 22.2v. Please see links in video information bar.
Thank you
shes brave
Can you give me the link to that out board
The link in the video info bar to Fullers Fast Electric where I got it does not work anymore. The outboard lower leg is an REK but I did a search and could not find them for sale anywhere. They might not be made anymore. Check offshoreelectrics.com for other outboard drives. I know they sell a few different ones.
RCFF-DiehardRC Ok thanks for the help!
nice tug boat! hahaha
Hi
Do you still own this boat?
Commycrua, I still have the boat but don't run it anymore because the hull has too many stress cracks. I stripped it down to put the parts in my Aeromarine Predator. Here are some videos of it running on 4s and 5s. 4s test runs ua-cam.com/video/1ImzXVk5_ZE/v-deo.html 5s test runs ua-cam.com/video/eNBHvK6SgyY/v-deo.html
RCFF-DiehardRC cool, any chance you have some pictures if the outboard setup or if you could take some? My friend just bought the same boat and is looking at buying the same outboard.
Thanks
Mine won't get up on plane
ดีมาก
วสันต์ ทัศน์สูงเนิน Thank you
poor geese:/
Get a better ESC
check some of my boat vids out lem.e know what you think...
fitst
WoW fast reply, Thanks.
I already have some 5000 3s , would that get too heavy ?
Hello, How did you replaced your lower drive? i might using 6S on it. Can you pls tell me how to do it.. Thanks..