hey guys. still my foot pedal continues to give me problems. the belt seems to always slip off the cog. ill open it up and fix it then after a few pushes of the pedal and the teeth slip out. ive had enough of this poor design. does any one no how to set it so its at zero. dont know exactly what im doing. also any one have any suggestions on how i con modify it so i wont have to fix it any more. ?????