Wheels: 3 Is Simple; Simple is Good

From the start we suspected that TTM would end-up having two motor-powered rear wheels and one wheel or caster in the front. After trying out two wheels in the front, a small caster, and a small wheel attached to a metal square, we opted for the small caster. It was the least fussy option, provided for easy turning, and gave the entire vehicle a slight downward and forward tilt, which we knew would be useful later on when we attached a ramp to TTM.