TEC Sidemount - Full/empty tanks

Here is a video from today, showing me in 3 cylinder side mount where in the first clip they are full, and in the second clip they are nearly empty (20-40 bar).
See that the butts of the tanks do not go sky high? That's what we want to achieve, otherwise we miss some great benefits with side mount. Have to compensate for the change in buoyancy, especially with aluminium cylinders.
First clip the main cylinder is a bit too negative, but not crazily much - but I'm not fully happy with it.
Choose a side mount instructor wisely, it's not a bad idea to see how he dives and what mindset he might have to side mount. If it's just another Instructor specialty Ccard for him, and dives side mount twice a year. Think about it.
It's takes time, it's a lot of fine tuning, it's never perfect. That's the beauty of it.
And yes, I am using only standard valves only, so no left/right - with the proper training this is fully possible.
If you happen to like my style, make sure to enroll a PADI side mount specialty course with me in Thailand. Messenger for information!