Well I purchased a set a rear Timbrens for my truck. After one week of testing, I decided to return them, here is why. Extremely easy install, that's a given. They absolutely minimized the rock...
Ask the tembren guy if he's ever had any real world experience with a truck camper...
Bad 'Expert' advice happens to me ALL the time...'Per tembren', the H.D. version WAS designed for a tow truck having a cantilevered load, this reason is why tembren made a no charge exchange (HD for Std) on my buddies Lance 1181, after which all was and still is quite well...Expert?? (LOL). From someone who actually owns a truck camper, stay away from the HD model and you'll be a happy camper.