In pics you can see Dave's work. Very good 4 way combs and please note his additional rib. The neat things about the rib are these: 1) it tapers as it is elevated at the rear nearly to 3/8" and down to 1/8" at the front. It does naturally raise the sight picture for a higher POI. 2) rather than sit on top of the rib, it is actually a "cap" that fits over the rib and the rib that you see is identical in width to your current tapered rib. And 3) it is attached without screws. Looks very natural. I Some pics of his work on my preferred gun.