It is not the cutter.... it is the Patterns are worn out or are wrong initially.
The venders send the patterns to the cutter & say "Cut this" and they do. HUNDREDS of them.... The patterns get worn out after hundreds of them are cut from it, & they may not build the patterns back up from the wear, they just keep using them. (or they were not correct initially)
I had 3 Chambers stocks over-cut on the lock inlets, RR pipes, sideplates. I won't buy any more. I quit buying from TOW long ago because of this as well.
I have been told by several that Chambers, TOW, Dunlap, etc are all having them made by Pecatonica But... on THEIR OWN individual patterns. So it may not make as much dif. on the cutter as it may rely on the cond & accuracy of the Pattern, as the pattern that makes the pre-shaped stock correct or not. That boils down to how many stocks are cut on that pattern & how well the Vender keeps up with the wear on it, and is it correct Initially.
I have had several venders send me patterns to check & see if they are cut correctly. I would check them, mark what I thought wrong & send them back. 2-3 times of this & they have a pattern that a person can build a rifle on & not have to start gluing in strips & chunks.
One thing I would insist on if I bought one. I would make sure they know if it is not correct or is Over-cut, it is coming back Collect & they are giving me a Full refund, or I would not buy from them.
Keith Lisle