Where to start on repairing this Demon???

You really need a jig to get it square and lined up before you start hanging sheet metal. You should be able to find help here with measurement points on uni body. If not right you never will get straight. I would stick with this body and not re body as that just hurts the hobby.

I kinda agree with you the same approach… Luckily I have (2) demons sitting right here for reference… I think what I really need is some approach to the pcs to square up first, 2nd, 3rd, etc…

Ie do you put in the new AMD side trunk gutters first and tie them to the tail panel…and then move to the 1/4's etc… there should be a method to which pcs to start with…can you square up the trunk hole opening and then hang everything from there…

There's gotta me a body guy out there who knows the best sequence to feather this all back together