cheers,
I'm a bit stupid when it comes to the measurement part. I've got a few things to work out and I don't know where to start. I made a guitar before, and it had none of this compensation thing. The zeroth fret was the nut. Also it had no neck angle - just flat. Saying all that, it was a great guitar (here). I don't use anything else now, my old strat is now redundant.
However, this bass, as far as I can tell, must have some space between the nut and the zeroth fret, something I have no idea how to work out. I was thinking just to leave an arbitary few mm and hope for the best, but that may not be a good idea. Also, it's going to need a neck angle, but how much? I don't know how to work out these things. I've tried drawing diagrams to make sense of this stuff, but I can't see where to start.