1)The angle of attack of the sponson ride surface should be at about 4-5 degrees. We used to commonly use about 6 degrees, but with increased speeds and lighter battery technology, we found boats were blowing over more.

2) The true sponson depth should be  about 1 inch.

3) The depth of the bottom of the prop shaft at the transom should be equal to the true sponson depth.

4) The rudder should be mounted on the right side of the transom if you run with left hand corners.

5) The prop weight of a fully loaded boat should be  about 3 ounces, but this can vary greatly based on the boat's design and set-up of the prop shaft angle, etc.

6) The weight of the boat should be offset to the left by 10% but you'll have to see how your boat reacts to that.

7) The pivot point of the rudder should be behind the trailing edge of the propeller.

8) The tunnel width multiplied by 2.18 will give the ideal distance from the back of the sponson to the leading edge of the propeller.

9) At the exact moment you think you have it all figured out, you will discover that you are wrong.