You have sure been through the emotional wringer! Your thread is like a good mini series! There's always a cliffhanger at the end of the episode, and I have to tune back in to see what happens next!
Seriously, I am so sorry for the mishaps during your build. I can tell you are meticulous and detail oriented, and though you handle it with grace, it's got to be a real burden. I know it would be for me. Hang in there!
As an aside, when I saw the damage your scupper I thought, that could look really cool with copper/patina. I'd question the possibility for staining of the plaster below them or throwing off water chemistry from the exposed copper, but otherwise, I think I'd personally like it.
Of course you could just make him replace it, and to avoid the mess, hold off on plastering until it was done.
Good luck! I look forward to seeing how it turns out. "Be sure to tune in next week as NurseNini...."