'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
There are lots of people who mistake their imagination for their memory. - Josh Billings
Law of Logical Argument - Anything is possible if you don't know what you are talking about.