We have cut stock blanks for modern and primitive weapons, Most forearms and short stocks for modern weapons now, are 30 years old still laying in the rafters of the barn. The factory stocks and kits have always been a little too wet. The secret to a good fit is moisture content and sharp tools. I want a good solid contact the length of the barrel, but not a harsh forceful install. I have seen some factory carved stocks that, I thought, were chopped up especially on the bottom of the barrel channel. Dry wood, very dry, patience and time with hand tools or automated tools is my answer. CVA used to make a two piece stock, like traditions, may be the same kit. While on a junket run two years back I purchased a CVA kit that had been purchased in the early seventies. It must have been setting in a closet in opened package. The wood was a pleasure to work with and not much inletting was needed. Yes, I know that the average joe wants to get to shooting right away, so get a factory made, If I were to buy a kit, or carve a stock I want the wood dry. I would unpackage the kit, protect the metal and put the wood somewhere protected and open to the temperature changes, maybe for at least a year or two.