Holy sh.......t!

It's the left rear pads that are worn.Simple.

Stooooooopidddddd!

How could I have missed that?

I swear I had inspected ALL the discs (with the wheels on) and didn't see any of 'em being "eaten alive" by the pads (no scoring).

Guess I wasn't looking close enough...but at least the issue i sout of the way for good!

Looking back, it sure sounded like it was coming from the front left wheel though...