Fin Keel
I agree with what David said regarding comfort and screens. I, too, moved up from a full keel (1966 Islander 29) and found the biggest difference is in the movement of the stern when turning (into a slip, for example). The Islander tracked like a car going into a curve while the 336 has a turning point directly above the fin - as a result, the stern will "swing out" at the beginning of the turn. This much tighter turning radius will allow greater maneuverability once you get used to it. Also, in backing, I've found I need to get up some speed, return the motor speed to idle, and then turn the wheel before the rudder will "bite". All that being said, you're gonna' love that boat. Check out the owners reviews (under Boat Information on this site) to see what others like, dislike, and what modifications they've made. Ned and Tani Strain s/v Family Therapy 1995 h336 Chicago
