On the back, I take a slightly back strap with one wrap around the rear wheel and to the other side. This really is to prevent the rear end from drifting and using the wheel allows the body to go up and down independent of the straps.
I put specific straps on the front wheels, so the body can also move up and down freely.

Your comment about wrapping around the rear wheel to prevent the rear from drifting is fantastic. I just put two straps like in a > < but I haven't tought about wrapping around it!

I'll do it too! Great advice!
