
Originally Posted by
Simon Barden
There shouldn't be any gap, and if you look at your earlier pictures there isn't one when you were just holding the neck in place.
You ahven't got any pictures of the back of the bass so I don't know what you've done regards the neck screws. But the holes in the body for the screws to go through should be just big enough for the screws not to bite into the wood, so that they can pull the neck firmly down onto the body. If the screws have to screw through the body as well, they can't do that properly.
I presume you've remembered to fit the neck plate, so the screw pressure is spread out over a wider area and the screws aren't being 0pulled into the body.
Also check that the bottom of the neck pocket and the neck heel are smooth. Sometimes the act of tightening the screws can pull the wood out around the holes, which stops the neck seating properly. Get the neck sitting flat and you'll probably find the pickup heights will be fine.