Can I just add to what Simon said. When you go to reglue the nut don't go crazy with the amount of glue otherwise it'll be a lot harder to remove in the future if you ever need to. As long as it's a fairly snug fit in the nut slot you shouldn't need more than a couple of tiny drops.
In fact on my kit tele my nut isn't glued in at all because of how firm the fit is on the nut slot. My scratch thinline tele I'll need to use a tiny amount of glue because the slot isn't as tight.
So my guitar is finished and looking, sounding and playing great. Very, very happy with it. I had intended to keep a proper build diary but never got around to it. I have a few photos I took during the process that I was gonna stick up now so everyone could see all the hilarious, amateur mistakes I no doubt made but my pics aren't uploading for some reason. They're all saved as jpgs so should be fine. Anyone had this problem before?