I came across a used Glock 21 a few months ago at a price I couldn't turn down. I like it and shoot well with it, but really don't have a need for another full size 45. I came across a few articles where people discussed having a gunsmith cut the grip down to the size of a G30, giving them the flexibility to CC it more easily or use the full size magazines. Has anyone done this, or have any thoughts on it? I understand I'd take a hit if I wanted to resell it, but I'm not concerned with that.