Thanks for the suggestions. Answer a few questions:

1. Whether it is worse in the wet ? Can't answer this question. It was always sunny/cloudy but no rain in the SF bayarea lately.

2. Exhibits very little reverse braking before & after bleeding. I suspect the problem is beyond a simple disc & pad job.

3. I'll replace the discs and pads and inspect calipers as Psfred suggests.

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Shane83SD