What I've found is it really depends on your linkage and rudder set up. My 2000 Elam won't turn with an S3305 due to the drag in the set up. I was forced to upgrade to an S9156 with roughly three times the torque to get my boat to turn reliably. Now without seeing the setup in my boat, you may question this. The boat was built with a molded aluminum arm that slides on nylon inserts, installed in the left engine bay wall and airtrap and just forward of the strut, with the pushrod from the servo running through the engine bay and the rudder bracket being offset way out against the inside of the left shoe with the pushrod to the rudder arm just inboard of that. This arrangement has a lot of drag and weight in the back of the boat so more "grunt" is needed. Now, if you're using a straight pushrod between the servo to the rudder arm, an S3305 should work well