I've finally settled on the definitive pickup array for my Jazz Bitsa (well, for now) and am left with a body cavity leading into the neck pocket from pickup placement experiments (it's a big, MM hum bucker sized cavity). I'm looking to fill the gap with a dutchman initially for strength, as that's where the neck joins the body, but I reckon there's the possibility of choosing a 'proper' wood to fill the gap that will benefit me tonally.
I like quite a bright sound in my basses, so the obvious ones to go for would be ash or maple, but does anyone have any other ideas. I likes 'em a bit growly too, so would it be unfeasible to shove a lump of wenge in there, or would that just be too pricey?
Advice sought.