For what purpose? Why not just get the subcompact frame?
I know a lot of people are doing that because they want the squared trigger guard. I own both and wasn't aware the sub was round until I read it in here!
Seriously, I had to go open the safe and look for myself. So then I was worried about my holsters, especially the plastic ones that use the trigger guard to retain the the pistol. To my surprise my Bladetech locks either one in just fine.
Another issue is if you prefer the size small grip circumference on the subcompact frame- you lose the rail.
Anyway, I think it's easy enough to do with a hacksaw blade and sandpaper to smooth it out afterward. It's a $40 investment and should easily satisfy anyone's urge to mod their pistol without the silly soldering gun "enhancement" the glock FBs love so much.