• Bear in mind that if its CNC routed the tightest internal radius of a cut out will be the size of the cutter, probably 12.7mm, so no sharp corner triangles. If it’s laser cut (what I’d suggest) that’s not a problem.

    Solid walnut is not a good idea from a cost / durability perspective. Walnut veneer 6mm ply would be better. Veneered MDF would be even more “dead”, and probably easier to source than veneer ply that thin.

  • tightest internal radius of a cut out will be the size of the cutter, probably 12.7mm

    In wood, you can rout at least 4×D, so in 3mm material you could use a 0.8mm bit to give 0.4mm internal corner radius, which is effectively a sharp corner visually.

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