OK, I took the MH in to the large local dealer here. They tested the brake fluid for moisture and there was 4% water in it so they flushed the brake fluid, checked the calipers, tested the pressure, and test drove it. They said one rotor showed signs if being hot at some time but that the caliper was free and moved easily. They checked all calipers for being free to move as they should. They said the master cylinder was OK. I am very happy with their service, it was not cheap but very thorough and were very good at keeping me informed on their progress. Thanks for all of the comments!