GONNA BE HARD for me [PedalChopper.com] TO TOP THIS ONE.... Jesse James Tank - made functional / 24 inch 'polished' alum. wheels frt&back / 3 speed jackshaft to motor and 3 speed pedal power.... POWDERCOATED frame, etc.
yes - I manufacture those kits - to bolt on 3 speed system to OCC style stingray: https://www.pedalchopper.com/3-speed-transmission-jackshaft-compI love the suicide shifter. Bike looks great.
What I'm saying is i think you posted a bad link. Must be close but no cigar.
if you maintain precise adjustment on gears - we are getting phenominal life out of these sturmey archer 170mm hubs. But if you put motor power to them when adjustment is misaligned they will implode....How well do the 3 speed hubs hold with an engine compared to pedal power?