I have a Y2K Busa with the rear brake master cylinder leaking. It has been doing it since new but I don't want to take it in yet and have it sit for a week waiting for parts. I keep an official color coordinated rag rapped around the boot to keep the fluid off the paint. They tell me they are going to rebuild it first and if that doesn't work then they will replace it. Sounds like 2 trips to the dealer to me. Anybody else experience this?