Hi Waz,
Here is a draft plan (the scale pdf is too big to attach here so P.M. me your email address and I'll send it to you).
https://i.imgur.com/bhtNao9.jpg
I ended up drawing the body because I realised on the other plan the layout and shape wasn't quite the same as the XT-2. This should be pretty close. The overall length in the information online is 38.5". My drawing is 38.43". The only way I can get it more accurate is if you can give me the dimensions of the headpiece and the bridge.
I also drew it as a neck through because you mentioned about possibly having a go at a neck through.
It goes without saying that you should print it and make up a MDF template first and layout your hardware on the template to make sure it all works. If the plan needs any alterations let me know and I'll make the required changes.