Hi there
I need to do a full pocket shim on a 5 string bass neck due to the heel being convex and loosing about 1.7 mm in height in the process of making it flat. I understand a thin piece of maple is best practice for this, but in your opinion are there alternatives that offer the same sonic value? Metal perhaps? I'm finding it hard to obtain a blank piece of maple of the thickness and size (75 X 105 mm) I need for the 6 bolt neck pocket.

Many thanks.