I believe that custom gun maker you are talking about is New Ultra Light Arms. I went out to Morgantown, WV, and saw his setup. He convinced me that if you having to free float or tighten the screws to just the right torque, then its compensating for something. I do believe him, but his rifles are $2400. But he does get subMOA groups out of a 5 1/2lb scoped rifle. Thats pretty incredible.