3.5 Fin?
Be careful with the measurement of 3.5' for the fin keel or working from it as a baseline to adjust for the shoal keel (by which I assume you mean the wing keel). I believe that the fin keel on our Capri 22 is bigger than that. I know we draft 4'2" plus. If you simply measuring the keel itself perhaps it is 3.5' after subtracting the hull to waterline portion.In any event, you might want to get ahold of Trailrite, the people who sell the trailers to Catalina for the Capri 22's.George