My wife confiscated my BBS02 hardtail which has a 52V, 10 a-h battery, so I constructed a similar bike in order to ride with her. Already had a mid-80's Schwinn High Sierra frame (back yard reclamation) and the other parts for assembly including a $400 Luna BBS02. To make a long story short, I installed a solid axle on the rear Shimano hub since the bike was planned as a rigid single speed; the horizontal dropouts on the frame facilitated this. It's assembled and with a 52V, 6a-h battery seems to "run like a rabbit". Extended ride and pictures planned for tomorrow when I'll have some numbers on range and speed.