Finished this project, meet Frankie, my “new” fretless bass! (named her after the Frankenstein reference earlier in the thread) The hardest part, I found, was all the soldering connections on the inside - a real luthier would cringe if they saw mine - but, unbelievably, this bass works! I went with white and gold colors, as there is so much black and chrome out there, wanted something different.
The only issue is the action is a bit high - I sanded the nut down pretty far and the bridge saddles are as low as can be, but it may be because this was not designed to be a fretless bass. The intonation is sharp too, and I put the bridge as far back as it could go, saddles back too, but it’s all good, because since its fretless, I can just finger slightly above the fret marker line.
There are some things that were rigged too, I confess. Not having a router, the pickup cavities were widened using a flathead screwdriver as a chisel, and a hammer. The pots didn’t fit till I hollowed out the cavity some more with a drill, then, they were made for an American fender, but the knobs I got were metric. Let’s just say I made it all work, but it was fun too 
I don’t think Frankie will be my go-to bass, by any means, but I have a new respect for fretless players (your finger better be right-on, or your pitch is off!), it’s making me develop my fretting technique. Plus, tons to learn for anyone willing to try this - I have no qualms now about stuff like changing pickups, or other parts, or even doing soldering on a bass as needed. Anything with the fretboard, and major things, I would probably still get done by an expert though 