I think you are talking about porpoising (front of ski bouncing uncontrollable). I have 2 machines, one has the stock ride plate, the other has a west coast ride plate that is about an inch longer than stock. I don't notice much of a difference between them when it comes to porpoising. I think the West Coast plate planes quicker but they both bounce pretty bad until I learned how to ride them. Keep one foot forward, legs bent, and transfer your weight when it start bouncing. Also slow down. The choppier the water, the worse it gets.