To quote a friend of mine who's done more than a few roof skins:
"Sometimes a vinyl top makes sense after awhile"
Its going to take a lot of fiddling; don't force it, don't get mad. Just walk away and come back tomorrow.
Thats actually a very nice trial fit to be honest, and better than I expected. I'd be pretty happy with that piece, as long as you inspect it close for handling damage or an uneven crown.
I've been redoing the interior in my streetrod all winter. Nothings square, nothing lines up and sometimes you do the driver side and it looks so much better than the passenger side that you just did - you feel compelled to redo it. Just relax and take it in stride.
Thanks for documenting all this