Hello all, I have a question for anyone who's had the brake booster replaced on their car. I have all the tell-tale signs: a hard feel when pressing down on the pedal, hissing sound when pressing down on the brake pedal, a short screeching sound when the pedal is near to the bottom. My question is now whether its just the brake booster and brake booster gasket that I'll need or a new brake master cylinder as well? Mazda parts told me its master cylinder as well. Anybody replaced this part before?