I just sold my C22 and have made a deal on a 1984 Catalina 25 , I'm looking to purchase a loos gauge for tensioning the rigging , for my 22 I had the PT-1 what would the rigging diameter be on the 25 ? I can't seem to find it on line , I did see one reference to the upper shrouds being 3/16" if that is the case wouldn't the stays be the same ?