Thanks Stansby. I’m following your build with interest. I’m planning a paint finish as well - and like you, I’m planning to set the neck before spraying the back and neck. I haven’t decided yet whether I’ll finish the top before setting the neck. I had a look at some Epiphones in my local music shop to see if I could get any ideas on how best to do it, but came away with the impression that the finish on many of those isn’t all that good.
Anyway, it sounds like my neck fit is now within the bounds of acceptability, so I can move on.