Basically I'm trying to create a vehicle similar to a wheelchair. I want it to be able to rotate around the center (one wheel going forward, one wheel going back), rotate round the right wheel (left wheel is going forward/back while the right isn't moving), and rotate around the left wheel. In the future I'd love to be able to blend between the rotate points, but for now I'd be happy with just the 3 points of rotation. Is there any easy way to specify where the center of rotation is and change it?