Glue spots all gone, sanding nearly done, and headstock shaped. Was a lot easier with a dremel than with a hand file.
Now I'm waiting for my custom dingotone and figuring out what I'm going to do with the headstock colour and decal etc.
I was thinking about staining the headstock the same colour as the body and neck, then cutting a "decal" from a vinyl sticker, sticking it on, staining the headstock face black, and then peeling the vinyl off to leave body-coloured lines behind. Does that seem like it'd work?