Makes me wonder a little bit? My 75, which is what some refer to as a B model has the inboard brakes. Salesman mentioned that the outboard brake models had a tendency to catch trash and could start a fire or at least get warm enough to make smoke. I wonder if your problem was something related to overheating there.

I'm also on the first set of replacement tires for the idlers. Decided not to foam the new ones. We'll see how that turns out??