I have been restoring a '75 Catlalina 27 the past two years and have her in splendid shape. She did not come with roller furling, and at almost 60, I think it is time to add it or get another boat that comes with it. How expensive is it to install a CDI #6? Should I get a new sail with it or have one of my genoas (one very new) modified? Obviously, I don't want to get into a very expensive addition....sailboats in the DC/Annapolis area are abundant, and I probably could find another boat with roller furling for less than a very expensive addition to my present boat. Many thanks.