I've got my Bafang mid drive kit installed and about 100 miles on it so far. So at 22,300 or so miles I stripped the Big Dummy down, painted the inside of the frame, installed two new wheels with all new front disc brakes. Replaced the shift cable for the rear. The new mid drive gives me an all new crank, chain wheel and bearings and eliminates the front derailer. I'm now ready for another 22,000 miles.