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Was talking with a few people about the UBAR3 and using a M5 nut in a recessed pocket for the grip screw. Looking at the files there are about ten different versions of the UBAR3 but I couldn't find anything about the differences? The file names are clear as mud.
Ah, I didn't have much time to read and skimmed it and missed it. Doesn't sound like anything that affects the grip nut.... Thanks!