Una one added part. Before you contract, find out from the various folks
how much it will cost per panel that may have to be replaced. Thats the
hidden 'gotcha' and there can be HUGE differences but once you start, you
have no choice but the follow through. The job has to be finished pretty
quick once started.

You know you have leaks, so you know you have damage. Factor that in, and
the earlier fixed, the cheaper it is.