Yeah, walnut is walnut and even with a clear finish it will be dark. Theres a reason why early craftsmen used rotten walnut husks for a dark brown stain. I would just embrace it for what it is.
That PG and knobs would be easy to replicate in maple, especially Birdseye, and it would be stunning.
That PG and knobs would be easy to replicate in maple, especially Birdseye, and it would be stunning.

