We are attempting to restore(or redo) a 1973 Cal 25. I am sure we will be coming here for much needed advise on a regular basis. The previous owner had done much to the boat. Including deck sole replacement. Unfortunatly everywhere there was a leak he (or she) filled the hole or crack with silicon. So it leaked again and much of the new core will have to be replaced again. We want to do this right this time. If anyone has undertaken this type of project and would like to give advice we would love to hear from you.Thanks