Originally Posted by Alecossy
I worked the truss rod a bit so that the neck is completely flat (or at least that is how it looks) and the fillings were done so that they are on the same level as the rest of the neck, nothing is sticking out. As for the fretboard radius, I didn't want to try it as I am unsure how to do it.
Edit: I didn't touch the nut. I'm kind of afraid of making a mess out of it and this is the only bass I have here (I moved to Norway for work and didn't buy myself a replacement yet).
There are a lot of threads in luthier's corner regarding radius sanding and the like. The nut is vital - by losing the frets, you effectively lose a significant part of the height of the fretboard/fingerboard.
As for neck relief, it is vital that a neck has at least some
relief. Playing with a dead straight neck is going to cause issues with buzzing. Neck relief is very subtle but necessary.