It's a really simple procedure. Bed the forearm to the hanger. Drill a hole thru the hanger as far forward as works and tap to 6x48. A screw is inserted and a brass or aluminum washer is inserted between the hanger screw and the bottom of the barrel. This screw is used to put pressure from the hanger to the barrel. The fore arm being bedded to the hanger plays less a part in the barrel harmonics and since the steel hanger is more consistant, so is the accuracy, usually.. The washer allows for some slippage between the screw and the barrel..