Sorry Joe to mention the rears again.
I DO remember earlier post and checks, but just in case of something floating in the system causing a problem, I brought it up again, Always re-confirm-even if it seems at pain- I know.
I do know that you are a very,very detailed person after all these posts and I only try to make thoughts that may make sense for you to look at.
Q.? You took apart the calipers and cleaned per an earlier post, but did you replace all the seals/boots etc.?.
The pistons should have micro-polished finish, unlike a brake cyl. or MC. Fit is of major importance.
Again, just thoughts.
Have a good weekend, goodnight!
Doug