Sorry for keep bothering everyone. I am trying to torque action screws on Trr-Sr Tacticool Stock. I have read here where it is suggested 15-16 inch lbs. The front bottom plate screw and the front trigger screw are the ones going into metal, the other two going into the stock. The two going into the stock keeps stripping out before they reach 15 inch lbs. Do all four need to be tightened that much, or mainly just the machined screws? Thanks.