I love the concept (having played with two sets of sticks but not been crazy or good enough to do so vertically). Possible to accelrate in infinite suicide enough to keep it going?
Or figure out a way to a small version of a grinder on the end of a handstick (or have it drop from the ceiling if on stage or something if cable needs to be attached) or a handheld version, put it against the axle, grind away and don't run out of speed.