Sabotloader,
This is really great information. I just finished cleaning the rifle, so I reassembled the way you suggest with the tapping proceedure. I have squeezed the forearm and pulled back just as you describe above. I could not detect any inference. The dollar bill test and the printer paper test both stop at 5.5 inches above the lug screw. This seems fairly far forward to me. Do you think this area needs to be sanded to clear the channel further back? It is the black plastic stock. It feels quite flimsy out at the end. Two bills will easily fit in the gap near the end of the stock. The double bills will slide down to within a half inch of the spot one bill will reach.