The new regen controller has a built in power lead phase detector that checks all possible combinations under user control. However, the circuits are propietary. The 48 volt mod I did is sweet - almost up to the power of a .47cc although top speed is still limited by a maximum RPM due to circuit design constraints that translates to about 22 MPH with 26" rims. Since Federal regulations limit top speed to 20 MPH and power to 750 watts at 960 Watts with even 24" rims you have to keep it off the street.