Hi Dom, nothing wrong with using a Tri, which is why we put 5 boxes, some people just prefer the higher ride in a straight line and the shorter, sharper and more vertical turns. Especially underpowered, that is a good feeling. For overall speed and control, I prefer the Grips but I do sail quite powered. So it's just a question of style and taste - yes, I think with a smaller sail it could suit the Tri option better!
Our testing was done vs older Grip in both Tri and Quad mode, we found it better in all aspects, after blending in all the best features from the team riders boards and our own R&D prototypes?