'twere me, I'd cut-and-try machine to fit and to hell with the "correct" dimension for the diameter. I think I could get it closer by trial than I would by measurement.
But that's just me....
Try to make a living, not a killing. -- Utah Phillips
Don't believe everything you know. -- Bumper sticker
Everybody is ignorant, only on different subjects. -- Will Rogers
Law of Logical Argument - Anything is possible if you don't know what you are talking about.
If at first you don't succeed, try, try, again. Then give up. There's no point in being a damn fool about it. -- W.C. Fields