I would like a Colt 91A1 with the government Model roll marks. I have no idea what to do to customise it & turn it into a race gun. Other than extended mag catch/slide stop, Heine Slant Pro 8 night sights, & grips with finger groves. But if rich dude gave me a whole bunch of $$$. I would go to Gaston & say re-design the G-17 frame make the grip narrower, get rig of the backstrap area, make the grip rounder, & finger groves that fit my hand exactly. But still able to accept mags all ready in use. Make the grip like those gripper grips that Packmayer made, that I use to put on revolvers.