I went the same direction as Phil, but went with Sumo Springs which are similar to the Timbrens in terms of installation and action. I have had air bags on two trucks in the past and like the alternatives as they require nothing and are so much fast to install. In place, whether I am hauling the camper or our fifth wheel, the bed does not droop under their weight and when hauling empty I can not tell they are there.
Steve and Andra
2012 F350 6.2 gasser SRW LB
Fab Fours front and rear in case we run into a rhino
2019 Northstar Laredo SC