Thanks for the preamp suggestions, gents. I have an Audere that I shall fish out and consider. It is 4-knob, though, which is something I am rapidly thinking I do not want on this bass. Perhaps I shall have it passive for a while.
Right…I have put the PJ together and set it up. I wired the P pickup straight to the jack and left the J unconnected. The Nordstrand P sounds excellent, albeit a touch harsh in its current wiring. I hope and assume that it will be tamed a bit when wired up properly. The bass feels very nice to play and is lightweight and balances well. To recap, this is the body Dave made and the Warmoth neck.
The bass has a Fender 62RI scratchplate on it with holes for a thumbrest (under the strings) and pickup cover. I'm unsure what to do with the holes for the thumbrest - I think I shall just leave them as they are. For the pickup cover, though, I wanted to have the screws there. But why not go whole-hog? So I did. I put a cover on and, to my surprise, it does not hamper my playing at all and acts as a nice resting spot for my thumb or, when playing with my thumb further up the neck, for my hand.
No more photos of this bass until it is completely done. As it is right now, it looks too much like it will when it is fully done. This will make the final photo's impact less exciting. So there!