Oh, I totally understand the anti-neck splitter thought process. But, why a thick full sized spacer, when all you should need is a much thinner, rectangular shim at the end of the neck, to tilt it a bit.
I wanted to raise the entire floor and have more room for height adjustment at the bridge. A small shim put the saddles on the deck, and I don't want that. I'm going to do the same thing on my Fury project.