Best way to get 1911 grip stud off of grip screw

Over the years I’ve replaced all of my 1911 bushings with Challis bushings . . .
Same here. I really like that using their O-rings doesn't result in the grip screws standing proud of the grips. Plus I've used them without staking or loctiting the bushings in place and they stay put. G10 grips stay snug as well.
 
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