My son's razor E100 scooter stopped working and I believe it's the motor controller. The scooter stopped moving, I checked the motor and fuses and they all work. So that leaves the throttle cable and motor controller. You cannot purchase the motor controller any more so I wanted to just build the circuit myself. Anyone have suggestions on circuit layout or recommended sites with circuit diagrams I could use as templates? The throttle I believe works like a linear POT to adjust the resistance on the controller which controls the speed. Maybe it's the throttle cable, any suggestions?