I have a 09 1500 cc 4x4. Bils on frt, set at 2.1. Rear has air lift 1000s. With 20lbs in bags, sits nice an tows my trailer well. However rides real stiff w/ no load or trailer. If I drop air to 10psi rides better w/ no load, but sits low. What if I go to 1in coil spacers and maintain bags w/...