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I did when I replaced them they all came loose. so some locktite and really working on them has take care of it. they used to be 1/4 -20 now they are 8/32 if I remember right.

my last set of pinions had smaller setscrews it made it harder to get them tight. locktite will fix it and a lot of tightening though the small annalen wrench needed now makes it harder.