X8 Catapult Bungee Rail Launcher -- Design Enhancements

Video showing some of the design enhancements made to the original X8 catapult launcher design. And here are 2 links showing the launcher in action.
X8 Launch
• X8 Catapult Bungee Rai...
Launcher Bungee Dynamics
• X8 Catapult Bungee Rai...

[@dongyageng2398]

This is great

[@cochesalido]

looking to build one catapult for my X8 I found your catapult one of the best designs!
do you have some kind of drawings? plans or anything that you can shere with me?

[@vkumar95aviator]

www.rcgroups.com/forums/showthread.php?t=1950531

[@andykohful]

how heavy is the launcher?