Bit more mucking around. I decided to try and mod the tuners using the PBG tuners (which I'm starting to get a bit of a collection of) I pulled them apart and, what do you know, but the threads etc are the same, and the dimensions close enough that some parts are interchangeable. I quite like this.

Some doodling of mods on the headstock - I'm going to make a long odd shaped truss rod cover - a little like the Rickenbacker headstock I suppose.