Progress over the weekend: Ebony grain filler, sanded back. Wasn't really sure where I was going to go with finishing on this until I could see if the grain would pop at all. Now that I've seen it, I'm pretty sure I'll go for a stain. I was looking at the Dingotone Nullarbor Ochre, but it's out of stock, so looking for other options.
Also, I'm wondering if I should take the same approach on the maple neck, or if that will be too much of a contrast with the ash body.