Try our new info resource - "Aladdin's Cave" (Main menu)Just added a separate link to Ash's Dropbox thread (shortcut)
Looking at the rotors again, they're more pock marked from a bit of "clattering" as opposed to wear in terms of not much being worn away, if that makes sense. With the cavity volume being probably left not much different, or none at all, then that would support reasoning of very little pumping loss.Whatever has been through there hasn't been there long, and probably just ended up left in the oil filter.