That's a good shot.
I do construction inspections and litigation documentation support for a living. Here's the problem as I see it...you have ambiguous contract documents and construction documents.
Therein lies your problem.
You can fight the GC in court but you won't win. You can make a claim against the GCs bond, but you won't win. You can make a claim against the GCs insurance, but you won't win.--
The most powerful weapon in the world is ignorance. Politicians exploit it to achieve almost anything they want.