[scottyb]

The DCX is a good control but, a word of caution.
The DCX version has no rpm monitoring - which means you can over-speed the motor running downhill which will result in a catastrophic motor event.
So while you are watching the GPS, be sure to limit your downhill speed to your flat ground speed. Motor lock ups at high speed can be dangerous as well as expensive since the DCX also has no short protection on the output side.