OK, I'm already on to the next question. I want to power my ebuild with a 24 volt 350 watt motor. I am willing to pedal start and then have the motor kick in to help on the hills. Deacon has written eloquently about the pulse jet method of operating and I think that would work for me. So should I get a controller, a 24 volt relay or just a big heavy duty 30 amp switch? I'm leaning towards the controller as I think it might help keep me from burning up the motor. Razor has one matched to the motor I am interested in for $19 + $6 s/h, but I'm no electrical engineer and there's a lot of wires coming out of those things! There are generic controllers as well for a little more on eBay. Are they simpler to hook up? Would anybody here be willing to walk me through the process with either the Razor one or a generic? thanks - jd