It's fairly straightforward to get those rotors next to perfect. I cut 1.5" square shims with a half inch hole in the center out of a beer can and stuffed them behind the rotor in the inboard areas. Got my originals to within .002 on both sides. Like yourself, I wanted to use the originals, having very little faith in the aftermarket. One of mine even had a groove in it, but I'm still more than happy to reuse that. Brakes turned out very good. ... oh, and loving the build updates.
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