@Boneman @davenumber2
Well, folks.... I snapped the G string tuning it up and decided to have a look-see at the neck attachment and do a string change. You can see what I saw below...
The bolt is definitely a bolt and not the end of the TR. I knew that, but I just proved it. I took the bolt out, but it didn't loosen the neck in any way that I could tell. It didn't seem to make a difference, and I wasn't about to bang the neck with my hand without knowing what's what.
But, unfortunately, I cannot get the plate off the block. It sticks out from the neck block, and I was able to grab the edges, but it seems they glued the plate on or did something else to fasten it. I believe that underneath that plate there is at least one additional bolt...
OR the neck is just secured by the single bolt and is otherwise glued to the body. I think both of these are possibilities, and of course I have no one at Guild to actually ask.
Anyway, I refused to take a screwdriver to the plate to pry it off. If anyone knows more, please pipe up. This is as far as I can go. New D'Addario strings are going on...