Originally Posted by ollytheosteo
I've done three of my older Sterlings using a drill press and hand taps, mixture of calipers and MK 1 eyeball. I aimed for the center of the top tube and a 'wee bit' (ahem, prob about 1/8") forward of the center of the ball stack and they all work very well
That is what I was going to try at last resort, but if I can get the "official" dimensions I'd rather do it that way especially if they are coming from "the man!". I've noticed every gun I look at that has the the cocker style they all seem to be "just a bit" in front of the the feed tube.