Hi there, proud owner of a RW3, used it on 2-10 mile trips for last .. 3500 miles.  The torque never was what I wanted, top speed of 20 is just fine.  But now the acceleration feels even more sluggish.  Does anyone know when one might expect the performance to start rolling off, and how to identify if that is a battery/controller/motor issue?  I'd love to upgrade the motor/etc to get more torque, not sure which way to go.