Had a chance to begin part trois with some guidance from the local A&P. Hopefully this thread will help those who may be headed down the same path.   The AP suggested we pull the master cylinder for at least the right side since that was the first symptom. He was also perplexed about the hydraulic lock we encountered. He was concerned about the problem being common to both sides. He recommended we pull and inspect the parking brake.   His suspicions were well founded. When we rebuilt t