Do you not have a down-haul? The line that attaches to the bottom of the boom and gets tightened down and tied off on the bottom of the mast. Does not look like it in the photo. Or you might have a different sail than was intended for the Viper? In the photo it also looks like your rudder is up, is this normal? Was wondering about that on mine as there is just a bungee type rig like yours, and seems a little weak, like the force of moving forward would just lift the rudder up. At least you followed your feelings and stayed ashore! No reason to get hurt.