I have a 450w gear reduction scooter motor I'm about to install on my home built trike. The controller has leads for reverse, but in order to have a reverse gear, I'd have to install a fixed cog on the axle instead of a freewheel. Other than drag, are there any other drawbacks? One thing that concerns me is that it's a brushed motor, so maybe the brushes will wear out faster while I'm not using the motor. The motor is mostly for hills. Being diabled, I need some extra power up some of the hills around here. Reverse would be a nice feature, but if there are too many drawbacks, or potential damage to the motor, I'll just go with the freewheel and use "Flintstone" reverse.