I watched all that. Interesting link. and sort of helpful to many. But its all more of the same old lead battery badly engineered railway engines and front heavy rear drive chairs...
I hate to say it, (again!) but this
http://www.wheelchairdriver.com/BM-MK3- ... rchair.htm knocks them all into next week.
Shorter, narrower, about 3x the range, 15 mph, lighter by about 50lb, faster charging, better ride, puncture proof, off road & snow/sand capable, with 3x the power (at 45v and 150 Amps x2), and 5 times the battery longevity, as well as finished to last! And it looks cool. And it will actually respond to the joystick when you do!!!
Finished soon. Just doing the footplate. I am seeing how many rose joints its possible to use! Or thats how it seems today!