I was in the process of checkering a mainspring housing/backstrap today and while I was "on my way" there (taking some steel off to reduce overall grip girth), I decided to experiment a bit with the extra metal I was removing. I wound up kinda liking the looks of this, wondered if anybody else though there was any potential. It does not offer as much stickshun as sharp checkering, and, yes, it could be done the other way (90 degrees rotated). Next time I'm doing this I'll try it again only deeper with the verticals and/or double the frequency. It lends itself to being carried up onto the hump on the grip safety too.