With gratefulness to the forum and with debt for all the ideas that I have stolen. I present my work. The central idea is a "bottom bracket bike" and "wrench removal" At one point in the video you will see that it had an electronic anomaly. Finally I burned a PWM. I decided to isolate the motor (tractor axle and three nylon brackets) I hope you like it. If it is necessary I will put subtitles.