I ran ours for the first 3 years manual fill. Installed Air Lift quick shot compressor kit in '04. Dual control, in dash gage/ paddle switches, 2 gal. tank. Gage almost worth the cost.
Im remembering more like 350/400 but that was then...
Easy enough on the manual fill- but 'seeing' the psi, filling/dumping adjusting from the cab simply nice. Certainly a lot more convenient. Justification of cost? that's an individual call. Ive never regretted, was pricey but if setting up new truck I wouldn't hesitate to do again. Always playing with the air, either when loading or unloading, leveling at camp or adjusting.
12 years old and have only had to replace one of the paddle switches.
The manual fill valves are still in place.
