installed 3-2-13 flippen cold in ohio. pick up TT monday to give them the test. I had 2.5 lbs unloaded. Went to pick the tt up and looked at the level of the truck didn't look bad. I brought it home with 3 lbs. in the air springs. Love it so far going to try more pressure this spring when I finish hooking up the wireless. all i neeed is find a power source and that hole system is ready to rock.