Jim writes: <<7/32" = .21875. Agreed, I think industry standard is .218" >> Are the old graffs just as loose in the plate as the new ones? Not at all, they are a solid fit, all the way down, and they are .218" across their thread. Are the old graffs double (helix?) threaded? Is the plate double (helix?) threaded? No, and no. Have you 'tried' 1/4" graff?>> Well, I looked at one, but that is way too big for this. Why was 7/8" bigger in 1920? Wondering, Ed Foote RPT
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