[bstark]

In my mind you do not need the Trailair pinbox with the Trailersaver hitch and also that will eliminate an additional complication during hitching/unhitching. The tendancy of the Trailair pinbox to arc down when you come out from under the pin will no longer be added to the Trailersaver also wanting to rise when unhooking. The Trailersaver hitch will have a relativley convenient control you can use to release air from it "IF" required whereas the Trailair in most cases requires you to hop up into the bed of the truck to take the cap off the fill stem and depress the core with a key or something which can be a PITA.

This rise of the hitch bladders and drop of the pinbox lower jaw would require you to either remove air from them or to raise the trailer almost a full foot to align your height for backing under so that the two align for hook-up. You don't need that aggro. The Trailersaver can be optioned on install with an on-board Viair compressor capable of adding air on demand to the hitch itself, your truck tires, suspension air bags if added, the Trailair suspension AND your trailer's "H" rated 125psi tires. some of the 12v Viair's are quite capable little monsters that have a higher CFM rating than the cheap 12v jobbies you can get at any auto supply and it can be installed permanently under your truck alongside a frame member. OR you could just go with a 120v compressor capable of 135psi or thereabouts so it will push a full 125psi into your trailer tires without you having to sit there for an hour.

This is of course only necessary under very limited circumstances. You could trailer for years without having to release the air but if you ever do it's nice to not have to be a gazelle to do it.