1936 mechanical fuel pump

[allenmichael]

I have rebuilt a 36 fuel pump. The eye on the diaphram is not perpendicular to the pump arm. The holes on also did not line up on such diaphram. put back but does not seem to draw fuel. I saw on older post to try "twisting " the diaphram by putting in a vice, thereby removing any friction on the arm to side of the eye. Is it correct to assume I put the eye of the diaphram in the vise and twist the round steel section to get the position correct? Would it also mean that the eye is in some way threaded to the metal plate and that holds the rubber diaphram sort of like a sandwhich? Easy enough to try, just want to avoid ruining the diaphram.