Re: 135 genoa vs 155 genoa
In PHRFSoCal, it is assumed that you will be using the largest allowable headsail, which for you is a 155%. There is no benefit in going smaller unless (and this is important) the particular race you are entering, usually in a cruising class, allows a sec. per mi. addition for sails under 140%, which some do. It won't change your base rating however, which again, assumes your boat has the largest allowable sails.