I understand road conditions and such But you put a heavy duty shock on an F150 tk and you get a stiffer ride. Some what like a F250, you just dont have the payload of the F250. If they have a buy back of some sort I would switch to the softer shock. Mine are just a year and a half old. 2500 miles. I found the comfort control on e-shock I believe. The heavy dute are great shocks but i just think to stiff for 28' class C. My weight is around 13,500lbs. I also put the HWH stablizing bars on front and back for the sway problem. Help some what. Just wondering about the shocks.