Well, on the KW I put it on, before the air assist, you could not turn the wheel w/out the truck 'rolling' just a tad. Granted, a K100 (for those who do not know) is a cab over.
If you are doing lots of maneuvering, it can use up lots of air. I parallel parked an IH semi w/ it's trailer (small trailer) I have that had it (was installed when I bought it) and it can use up a bit of air. But it also depends on how big the air tanks are. The literature said that the air assist only 'activates' when a certain amount of force is exerted on the control valve. So it's not really 'working' at high speeds when you don't need it.
As I said, it's an option for those who have an old Bolt w/ an air system and PS might not have been available for it originally.
edit-
For you out west, there was a stocking dealer in Portland, OR. They have been w/ Air-O-Matic for over 30+ years so said the guy I talked to.
Emailing Maradyne won't work. I did that and waited nearly 2 weeks before I just called them. They gave me the name of the "local" dealer....
