Hi, I just had my tech install a shim in the neck pocket of my JV '62 Strat. The shim came out covering approx half the area of the neck pocket and it was made out of mahogany -- which is supposedly a preferred shim wood. I was very surprized to find out this '62 has lost some of its vintage sound and instead aquired some modern, bright tone, similar to American Stds. The original factory shim that was in there looks like a piece of cardboard. It's stamped with a date just like most other JV's that came with factory shims. Did anybody ever notice that shims change the sound? I actually thought that by getting rid of the cheesy factory shim (that wasn't even a full shim as it should be -- just a rectangular piece of cardboard) I'd gain sustain and resonance.