You are doing a fine job. I had been doing grips on STI, SV, Glocks and just about anything plastic. I was one of the few in the country that started this mods back in the day. Tony Kidd, back when he was with the AMU was what I believe was the first to do the grip mods. Aaron Harris out on the west coast was doing some, and myself, back here on the east coast. That was along time ago and many thousands grips later, I feel that I might know a thing about cutting, grinding and stippling grips.
I commend you Sir for taking that first step on the first one. That is were we all started, on our own. Keep up the great job and you may make a few bucks at it. Do remember that if you do this on others pistols, that it is your name on it ! Be proud of the work that you will do. One thing that you can tell your future customers, is that "the very first things that you will have to do with a pistol is get a grip on it". Keep up the good work and don't let folks talk you out of it.
Tommy Roupe
THR Technologies/Roupe Grips