Over the last few years, I tried to come up with a linear pedal system that would reduce the vertical travel of legs and feet. I've seen some interesting ideas on YouTube but they all seem to add a lot of weight. I've tried pivoting arms attached to push-rods, sliding arms attached to push-rods, a ratcheting system with a separate freewheel for each pedal attached to a jack-shaft. I've also tried a uni-strut frame and a wood frame based on the Mini-Indy go-kart plans. Once they got to the test stage they just didn't work like I had hoped. It seems like the most efficient design would be one that integrated the body and the frame into one structure. Any thoughts about linear to rotational pedal systems? (I've got some photos, but don't know how to attach)