I'm interested in building a two wheeled (2 motored?) ballancing robot. I'm wondering if anyone can recommend some motors allong with wheels and the necessary hardware to couple the two and a chassis or mounting brackets that will allow me to mount the motors coaxially to eachother. A 4 wheeled chasis would work well because I could use it in both a 2 wheeled ballanced configuration as well as a standard 4 wheel configuration. The idal response would be "I've done that and here is what I used." I just don't have the time right now for the extensive surfing required to find the perfect parts but this IMU board is burning a hole in my backpack and I want to get started as soon as possible.