Anyone hear of Gray Guns custom gunsmithing? I was going to send my USP 9 off for the Match Trigger to be installed by HK, but came across Gray Guns trigger job for HK USP's as well. $140-$180 for HK to do the work and $250 for Gray Guns to do the work, a $110 difference almost put me off from even thinking about sending her to Gray's, but figured I'd see what kind of reputation they have. Just by looking at how much work they put into a trigger job seems impressive to me. So far I've heard great things about them from the HKPro forum.