We tried the suggested 3 blade on an MC we demo'd last weekend. Boat barely got to 36 at the pre-gates....and this is NOT a short set up. Other times the boat would surge right before the gates. Went as far as to test it with plus setting on and off. The only noticeable difference was that the plus setting throttled the skier more when loading in the course. This REALLY confused me bc my understanding was that the plus setting was only supposed to be an increased entrance speed. Maybe the boat couldn't get it done and was making up later. I have no idea.....but the speed of the boat coming into the course was inconsistent.
As far as steering goes....I think I've figured it out. In my opinion, there is a lag in response from driver input on the wheel to boat response. B/c of this, you need to be 1/2 step ahead of the skier to not get behind. When I would torque the rudder a little earlier, I found that less input was in fact better....but it had to be done earlier than with other manufacturer's boats. My $0.02