I am putting together a couple Del-ton AR rifle kits. I selected the Ambi-ERGO grip as a option. The holes in the ERGO grips for the saftey detent spring is about .055 shallow compared to my mil-spec grips. This is putting to much spring presure on the detent and locking up the saftey. Has any one else seen this before? I can drill the hole in the grip deeper to correct the problem.