Ive done this to both of my gen 3 G-17's. Fit my hand better, balance better, & for me, they shoot better. Heavy texture grips, better sights. Just the way I want them.
I get the easy conceal ability of a G-19 with the longer sight radius of the G-17. IMHO, the best of both worlds.
Have 2 Kahr CW-9's. Both were jam-o-mattics, chopping the grips to use the 6rd mags instantly fixed the jams. Not one feed jam since. Even hand racking the slide doesn't induce the infamous Kahr Nose Dive. Now both are 100% reliable. One was even a numbered # of 1000 NRA commemorative. It got chopped too.
Did I ruin the resale of these? Yep, I certainly did. My kids can worry about that after I die.
As a side note, I've been offered more than new retail for both of these CW-9's by frustrated Kahr owners who can't get theirs running. Kahr makes a great little pistol, but the magazines are a flawed design. Kahr knows it but enough work well enough that it won't get changed. That's just the way it is.
In my opinion, and only mine, I feel that I vastly improved these 4 sidearms immensely. For me.
Take it for what it's worth. But, measure carefully,, several times. Cut slow. Have fun with it. If you get in over your head, STOP! Get it to a smith.