Ok. I'm going to update this thread one last time by saying that Cointerra has made things right by me. I will save the details of the deal I worked out with them for myself, but I will say that they responded reasonably quickly--after my initial attempts, at least--and they made me an offer that I couldn't refuse to try to make me happy.

There is no GSX 1 in my future, but I'm perfectly happy with the solution they proposed.

I wish they would have communicated more proactively, but I can say they stood by their responsibilities to their/this customer.