I've become pretty comfortable smithing my Rock Island GI 1911. So I replaced a few things. New skeletonized hammer, new beavertail. Nice upgrade! Going into this with eyes wide open, I figured there'd be some tuning to follow. Sure enough the gun runs fine but for an annoying sticky (gritty) pull on the first round. Followup resets are crisp and clean. Looking closely at the trigger bow, it is not rubbing on the grip safety. Could it have something to do with the thumb safety or disconnector? Wish I has a better understanding of the difference between the long first trigger pull and the followup resets.