Tinkering with thinning grips

I wanted to try thinning down my grips a little bit but I don’t own a belt sander and and I didn’t have any sandpaper that was good enough to use. Kind of short on sandpaper at the moment. So I wanted to find out how to hold it and run a file across it ... but how? 

I took those yellow dry wall anchors we like to use as rimfire snap caps, pushed them through the grip screw holes from the inside out, and while pressing down on them with a couple of pens I clamped the bench vise shut and that held the grips in place really well. Then I had control over my work with the file. 

Just some tinkering this evening. 

Well you could turn your Dremmel into a baby table saw. Or place them in a Teflon pan and heat till they get the desired thickness. Or you could look at these when bored.

https://www.altamontco.com/pistol-grips/1911-government/slim/

Be careful, you may suddenly find you need slim grip bushings!