1 ThePolecats 2 months ago On my Mosrite Avenger I took the neck off to find two picks and a couple washers between the neck pocket and the neck, actually the picks were probably laying on the neck pocket and the washers were embedded into the neck end. This was much to my surprise then I realized a previous owner had the neck shimmed. I know a friend of mine bought a Jazzmaster brand new made in Mexico and he took the neck off to see a playing card as a shim. He was mad because he felt for that kind of money they could’ve used a proper shim that would have been made for the purpose of a shim rather than a playing card. So I did some research and many believe that you should use a full neck pocket shim because if you just put something at the end of the neck it’ll cause the neck to sag eventually but some people actually don’t believe that from when I read what do you guys think?You can buy full neck pocket shims from Stew Mac. The problem with that is shipping is probably about eight dollars and the shim is probably about eight dollars so you’re paying over $15 for something that might not be the right angle and then you’re going to have to buy another one after that because you’ve already probably marred it and can’t return it if it doesn’t work. And it looks like it’s a difficult task to make one out of wood because you have to angle it right and all that stuff. Some people use business cards and kind a layer them but I think you and that’s hard to get the right angle.