NOT UNDERSTOOD BY A LOT OF FOLKS, matters little to me because no muscle memory poor coordination I just pump( for the duration spin is the word) my troubles go back to injuries and late blooming on anything that requires coordination, at 67 still cannot swim adequately, my legs do not do what they are supposed to,oh well will try to stay out of deep water, having increasingly difficult time to maintain balance. however am working on a (new to me build) espin nero, repainted, new hub motor,larger battery, converted to 3" from 4" tires. The repair stand fell over the other day and its been so cold the paint is not doing well, doesn't matter, next warm day its reassemble time!(also piddling with a trike) you guys hang in there,I can think of much worse hobbiesSpin, not pistons. Fast, smooth, and easy. Not slow or hard. It should feel like swimming with scuba flippers. Down shift, rev up, shift up.