UPDATE
This weekend, we took our 3060 RL out for the first time. I measured the rear bumper height of my F250 SD 4X4 of the unloaded truck at 31 jnches. Connecting and hitching up the trailer, my rear bumper dropped to 28.5 inches off of the ground. I inflated the airbags to 65 psi to bring the rear bumper height back up to 31 inches. My wife commented that my truck rides better with trailer on it then does unloaded. The truck pulled the trailer well and we seemed to “float” down the highway. When we reached our campground, I disconnected the trailer and checked my air bag guage. I found I had 45 psi in each air bag. I’m very happy with the results.