I own a 2000 9-5 Aero that I recently installed rear camber shims to help stop the problem of wearing down the insides of my rear tires. So far the shims have made a noticable difference but recently I have felt like my rear suspension has been kind of stiff. I have no idea when the last time the rear springs have been replaced since I have only owned the car for two years. I know the shocks wear replaced right before I bought the car. Is there any way to see if the springs are my problem before I go and purchase a set or any ideas on what else I should look into replacing to help the suspension and possibly the rear camber?