i would like to get new torsion springs for my sled, i want to get very stiff ones so my back ride hight is high. my back end drops down like crazy when i get on it and it doesnt even raise back up when im off ill pick it up and let go and it will drop back down. my flap on the back is like 1 inch off the ground without me on it, when i get on it the flap touches the snow.. what can i do to fix this? i know its the springs so thats y i want the stiffist ones. so were would be a good place to get them and a good deal on em? thanks chuck