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Does the plate have up/down slop as well as the side to side wobble? I’m not sure I understand the two measurements on the mag plates, but the one on the right seems to have a .009″ difference, which is quite a bit. Like Crosby says, make sure the aluminum threaded retainer is oriented properly, flat side up. Wear in the brass ring, and aluminum retainer, will cause up and down slop.
I don’t know what the measurement of the crankcase pilot bushing is supposed to be, but both blocks seem to measure the same, so I’m guessing there isn’t much wear. Some of us cheat a bit by “dimpling” the brass ring ever so slightly in an effort to minimize slop. Again, the word is “gently”, you don’t want to jam the mag plate or cause it to be stiff when rotating…