I built a mahogany(body and neck) Gibson Explorer kit in December. I took a break before completing the electronics and it hung on the wall for four months (from the headstock). Yesterday, I took it down and completed the wiring and added the strings. When I went to tighten the strings, I heard a few pops and the neck came loose. This is a fitted neck which fit great in December. After a lot of cussing and removing the old glue, the heel of the neck would not fit into the body (too wide). It's like the neck swoll up since December. This is the eighth neck I have fitted/installed and the third glue in neck and I have never come across this before. The guitar has never been outside and the only moist thing I have put on the neck is Scott's liquid gold. I took 3-4mm off the neck heel and it fits now but I would like to understand what the heck happened so it doesn't happen again.
Thanks, Chris