When the Gen3's came out, many, including myself, did not like the finger grooves. I asked GSSF several years ago if I could remove them. The answer was no, except for Unlimited Category. Now that we have Gen4's with a smaller grip, I asked GSSF if I could do a grip reduction on my trusty Gen2, just to match the size of a Gen4. Again, the answer is no, except for Unlimited. Bottom line, NO FRAME MODIFICATIONS! This is not a subject for debate. It's GSSF's game and GSSF's rules. It is that simple. Nothing to argue about or debate. Just play by the rules. The beauty of GSSF is the simplicity of the sport. Stock means Stock. If you modify the frame or the slide, it's Unlimited or nothing at all.