I decided to do this build rather than buy it off the shelf for several reasons. The Gomier is belt drive & I worried about slippage. I have come to find that is not an issue---the belts have teeth & are carbon--not rubber. The Gomier is 24 volt & so is my build it is just that theirs is 450 watts & mine is 650 watts. Another thing is Gomier's is limited to 8 MPH & mine won't be although for saftety you don't drive a trike over 15 MPH. The gomier is also geared for one speed where as I will have a 6-speed rear cassette w/ a three chain-ring front crank-set w/ two for the rear for 12 speeds---the third ring is for the motor. The motor will mount on the seat-post on the rear side so it is out of the way & that keeps the motor chain behind the rider. Ok so the 24 V 650 watt Cyclone motor will be powered w/ a Cyclone controller & 4 33-amphr SLA batteries series/ parallel wired centered over the rear axle. For a battery case I am using a ready-made tool box 24" x 9" x 8"--it is neat---the batteries just fit & the box just fits---even red like the trike! I am using so much battery because I need the range that the Gomier does not have.
Well, I'm tired of writing, planning, sourcing about it for a few months!!! I want to get started at least on ordering parts! I have to wait on the bucks though--Hopefully in a week or so I can order.