I have a 1975, S2 8.0c that I am rebuilding. I have stripped it down to the hull and have re-cored the deck, installed a new sole, stripped all the carpet out, and am in the process of laying 2 layers of 6oz fiberglass throughout the entire interior to smooth the interior walls that I will prime and paint. I have 5 ports on the boat that are 4x14 (2 in the bow, 2 in the stern, 1 in the head facing the cockpit) I have space to install 7x14 ports. What are the pros and cons to increasing the ports from 4x14 to 7x14 in the bow and the stern? I am not sure if I want to increase the port size in the head. I have been looking at the Beckson: Self Drain Opening Ports in the sailboatowners.com store.