Anybody have any experience with Dtech? I'm considering one of their uppers in a 7mm WSSM wildcat. It appears to come very close to fitting my hunting/LR weapon in a fairly lightweight package... 22" fluted upper is 5.8lb, and I think with some more fluting could be lightened up to 5.5lb or so. Enough poop to drop big game and shoot 800 yards is attractive, but I don't know anything about Dtech. Anybody have any input?