This morning I was idly fiddling with the new bass and picked up a tuner for some reason. I quickly came to the conclusion that the headstock was too thick. I can't explain this really, except that I can never remember measuring anything for the headstock. Lapse in judgement? Assumption? I don't know.
I considered using the orbital sander to thickness plane, knowing that would give me a less than perfect outcome that I would have to fix using a scraper, which made my hands ache (I've been using scrapers a lot lately).
I decided that a router sled was the best option, despite the potential pitfalls.
I rested the body of the bass on my workbench and clamped the neck down against the workmate, leaving the headstock flush against the top of the workmate.
I clamped two pieces of wood (nice ash!) to the sides. I was ready to go, but then as I did a test run with the bit up off the surface, I realized that there was a good chance of the base of the router dipping in as I went across if I wasn't careful, it's too late in the game for those chances. I saw the template for my pickup cover on the workbench and employed that as the sled under the router base. I worked really well, although I had to readjust the template a few times to get to the whole headstock.
I've got a lot more scraping to do, and now I have to reshape that transition into the volute, but it's getting there.