Looking at a number of different layout templates for the 80% receiver blank, I find a difference in the position of the 2 FCG holes. All templates agree that the hammer is located 4.90" from the rear and the trigger 3.35". Most templates place the hammer 1.1" down from the top rail, and the trigger 1.38". Some, however, place the hammer 1.083" down and the trigger 1.358". What is the consensus on which is correct? Thanks.