I used some of the COVID quarantine downtime to try my first pistol frame mods on a Gen4 G23 and Gen3 G26. Full stipples and trigger guard undercuts, plus finger groove removal on the 23 and mag baseplate for the 26. Turned out much better than I hoped. I started by grinding off the finger grooves with a bastard file, but that was slow so I graduated up to a dremel. Trigger guard undercut was done with a pencil wrapped in sandpaper and a dremel to finish. Next step was knocking down the factory texture to make a blank slate for the stipple. Pattern is a north-south zigzag using a wedge tip. One thing I learned as a right handed shooter with the mag release button on the left side, if you go too drastic on the trigger undercut your shoot hand middle finger will wrap around and rub against the corner of the mag release button, so I kept the cuts minimal enough just to get rid of any Glock knuckle problems. I also like that it retains the original lines of the frame and grip angle.