It’s great that we have someone on BC that has this kind of influence, well done again, @cetera.
I love the reverse bird design to look at (even Firebirds!) but the ergonomics don’t work for me sadly . Just as well, that red cherry one is 😍.
The growliest pickups I’ve ever used are Nordstrand Big Singles (I had them in an Ibby SR), if your EHB doesn’t have those already, I think they’re a drop in replacement.
I exaggerate a bit, I do plenty of mods. However, I’m not in the same league as the more talented builders on BC (league? Not even the same game, TBH) and I’d not be satisfied with any efforts I might make. I’d like to have the right tools, inc drill presses, routers, etc and the room to store them though.
I'd take the tuner off and warm it up before trying to straighten it, pop it in a plastic bag and put in a cup of boiling water for a few mins should be enough. Then gently ease it back as straight as you can get it.
As has been said, loosen the thumbscrews either side of the foam and that'll drop it down.
Truss rods (there will will be two if it's like my old 4003s). Opinions differ on how long to wait, but I'd give it half an hour and see if any difference has been made. However, expect to have to make another adjustment the next day, one way or the other.
Finally, that's a tasty looking bass!