I really did think about using a worn out 4th gen spindle, even throwing on a worn LS1 rotor I have (and figure a way to mount a busted caliper on it), but then the weight started to really add up. The actual hurdle for making it spin was how do you keep it from unwinding on the compressor side when you roll it up. Only thing I came up with was you'd have to do some sort of short hose from the compressor to the center of the mount, with some sort of 90* swivel end.