Hello friends, I am restoring a pre first-war auto-5 were the stocks is gone. The buttstock is almost completed, just the checkering left to do. Now I have to do the forearm. I have tried to make one with a horizontal boring machine but there is too much play in the sliding parts of the machine and the spindle is not perfectly turning straight. I have decided to try with a metal lathe. Unfortunately, I am not a machinist and never use such a machine. I am seeking some advice. Here is what I did so far. First, not being certain that the center of my blank will be the same at the jaws then at 13 inches apart, I cut a thin piece of the blank (see the thin piece on the left) and center it into the four jaws chuck and then insert the blank into the jaws and checked it at 13 inches apart. It was still center. Secondly, I drill about 1/4 inches deep into the blank then, I installed the hole saw to create the lip that will fit into the receiver. Here is where I am not sure if I will succeed. I will have to use two half inches drill extensions to drill through the forearm and I wonder if they will flex and deviate off the center during the drilling operation. May be there is a better way?