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Tom13-
Good point. I'll check my manual but presume the 0.30mm acceptable runout accounts for the semi-floating discs. Not exactly scientific, but fairly confident I can see the wobble by eye. Spinning the wheel by hand with no brake pressure causes resistance on the pads which also makes me think the discs are shagged.
jambon
Despite rebuilding my calipers (again) seems they're still not feeling great so decided to check the disc runout. 0.30mm is the limit and we're seeing 1.75 and 0.75, think that'll be it!