Hi Colin
I was looking at the site trying to remember the speed controller I used. It was the NCC 70 which is now called the VTX. I got the boxed one and also the 'pot' which I bodged to a pedal for the accelerator.
I remember it being about £70 so must be the VTX 40 24. Give the guy a ring, he was very helpful when I rang him.
I did have a single RLT motor in to start with but this was underpowered. I changed to twin wheel chair motors and it could carry my 6' 5" 18 stone mass up quite steep hills!
If you think about it a real wheel chair has to carry a sometimes heavy person around all day
I also ended up fixing the windscreen in the upright position as it was used as a handle for climbing in and out of the car.
I would like to stress again the bit about making the bumpers VERY strong the little darlings are very poor drivers and it will protect the car.
Nigel