Originally Posted by rccardr

^^This^^

OP sounds like they are pretty knowledgeable and maintain their stuff well. is just bamfoozled over a very different wear pattern that they have previously experienced.
Negative inference and comments are not required.

Only thing I would suggest is to re-do the bearing service, paying special attention to cleaning out any and all old grease, as it may contain some sort of contaminant. I am also a big Phil grease fan.
Probably a good idea to also install new bearings- again, yeah. Not all bearings are created equal, and you may have one or two bad ones in that bunch.

Finally, the 7700 rear hub has an unusual and large dust cap on the non drive side. I have seen these become ever-so-slightly bent where they interface with the hub body, causing the type of faint scratching you describe.