I have chopped up the DB30 and adapted a rear swing arm with rear shocks. I need help sourcing out a proper shock. With the two shocks in place it is too rigid and the spring rate is too high. I didn't realize that the shocks are rated at 520lbs a piece, with one shock in place it is perfect. Does anybody know a shock with around 520-650lb spring rate or to shocks combined to equal around that. Thanks fellas!