Andy I'am on it baby this is the tickit! I got one of your aluminum jewels at hand. There is an octagon shape to a disk brake rear wheal set up for mad max playing is concerned, why not have a fitt! make the inside diameter of the sprocket tightly fit the octagon shape? then mount it traditionaly as all these sprockets have been donefor these chinas . Youl be able to enjoy the disk brake, and the sprocket as well. Kill to birds with one stone. The sprocket bear hugging the octagon shape and the spokes would be a unibody structure cheating vibe probs, and running the hub. has anybody done this I'am without a chance for now, but fully intend to try!? hope this gets more Ideas?