I agree with Matt, Mary and Rick: I don't think the harness will change much, only the spreader attachment. As Mary said, I can't imagine being "required" to use a specific type of harness system for fear of a liability nightmare. In bouy racing I use a Gull Pro that has served me well, but for distance racing the ONLY harness to use is the long-leg style like the Worrell XL. Any other type will lead to pain and injury.