I tow a trailer for my business. I do custom interiors, kitchens, bathrooms, theaters, entertainment centers. We have been doing renovations since the economy has been in the sh@tter. Anyways..... I got tired of cranking the damn handle on the trailer jack. So I made a lever actuated stand/outrigger that holds the front of the trailer which is held in position with a ball lock pin. So with the air suspension I just back the truck up, look at the iPad which syncs to a backup camera. air down the rear end and when I get to the hitch I just simply air it up. Pull the ball lock pin out swing the lever so the outrigger goes up and re insert the ball lock pin. I also have a 5th wheel which I wanted more weight capacity. I use 3800 bags, which are rated at 5000 lbs a piece. So therefore I now has the ability to handle 10K on the rear. The bigger the bag the less air it takes to lift. I run 10-15 normally and depending on payload I can adjust to suit. It does ride super smooth. I would never go back to a leaf spring.