I also looked at the Durawood, which has shown it has properties that is very stable in all ambient conditions it would be exposed to. The stability of the material is very useful where microns are tolerances that can effect sound being produced.
I have parts produced from a selected material that has an exceptional stability as a inherent property. This material is used a component that allows for the interface tolerance for moving parts, to be machined to the tightest of tolerances, using a spacing dimension that is not usually considered for a passive interface. The same material also has the most attractive Coefficient of Friction for the role to performed, which is a Win Win for how the end product functions as a whole.