Rear bearing cap
Another piece that I didn't really need, but for $10, why not.
The original had steel particles (from the disintegrated bearings) embedded in the aluminum w/in the bearing bore. Rather than pick 'em all out, and dress the nicks & burrs, I just bought the new one.
Well, it's been milled too deep, and would not clamp the bearing tight to the rear cover, but left it loose with fore/aft end play. NOT what it's supposed to do!
So I ended up cleaning & deburring the original anyway, and using it. It did clamp the bearing tight.