That was an error by an editor (not my original words) which I pointed out at the time. "Sanding" the ridge away isn't possible. It was supposed to be deleted, as the only correct way to remove a ring ridge is with a reamer designed specifically for that purpose. Please trash it! I was not aware that it was still stinking up the tech tip!

https://www.ebay.com/itm/234447574904?

Jerry


"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!