Future Robot

I've got a couple of old wheelchairs that I want to re-purpose into robots the first one is my old wheelchair it's about 20 years old. The other one is an old one picked up when a friend of mine upgrade his wheelchair.

The best thing is they both use the same controller, so once I figure out how to get one working the other should be easy. I plan on using an Arduino with a radio receiver shield to output to the wheelchair controler. I'm very inexperienced with this sort of stuff so it should be interesting.