I just purchased a 1980 catalina 30 and find that all of the windows leak. I tried to remove the aft port one above the navigation table and found it virtually impossible to get the caulking out. I finally cleaned the top edge, pried it off and (astonishingly) broke the glass. First, are there any suggestions on how to easily remove the caulking so that I can rebed and reset the window? Secondly, I will try to have a new piece of laminated glass installed. Is this a waste of time or should I replace the unit? If the latter, where can I get one at a reasonable cost?