Air ride suspension

I have both Trail Air Tri Glide and Center Point Suspensions. I feel it is worth it as the combination drastically reduces the stresses the trailer frame gets from the roads. Lower stresses from the roads, longer lasting frames in my book. Most railroad tracks are not felt at low speeds, the truck feels them, the trailer doesn't. At parking lot speeds speedbumps feel like hard wind gusts from behind. I out onboard air on the trailer, and have an air fitting with an air chuck on a whip to top off the centerpoint, and I plumbed the trailair into the onboard air with a fill and dump valve. I can do everything standing in one place as far as filling air. The onboard air also fills tires, and pool toys.