The main looks a bit worn out in order to get it really flat. You might want to try with prebending the mast as well as applying lots of downhaul. You also want thee mast rotator to be ajustable to get almost no rotation, i.e. a VERY flat main. At high wind speeds drag from the rig is the most important factor. The T has a highly ajustable rig, which your shark doesn´t seem to have (yet?).