Whether very thick like the Hogue rubber and some wood grips, or very thin like the E2s, and everything in between, I figure grips are a very personal choice. The "thin" grips on my 229 use the same grip screws as the standard factory grips. The longer factory and aftermarket 239 grip screws I have protrude into the mag well on 229s. And in 30+ years of using various alloy framed SIGs, I've never lost a SIG grip screw, or had one strip out, etc.....YMMV