Also the CGW roller is meant for CERTAIN sizes - and they do not make a smaller one YET. My rollers all seem to measure .214 or less. Dave told me just polish mine and not to worry. So, I put mine on a brass punch and hit it at speed with a felt wheel to smooth and even them out. Works nicely.
But as has been said - SA go hammer. DA - polish trigger bar, hammer strut, and TB spring tuning (and I polish this too). When you want it lighter, look into CGW kits: extended FP, etc.