I already bailed out on this one - I looked at it for a little while last year and found a good, usuable system would be far too expensive in relation to the mild beneficial gains and new negatives. The front suspension is pretty stiff and doesn't allow that much travel anyway, ADD air to gain lift and things begin to stiffen up even further and you would end up losing precious travel. When you say "supplement with air" you have to realize you are effectively adding an extra spring to the mix - multiplying spring force - causing stiffness. Now if you were to use some kind of switch and valve system to send air from one side to the other as a method of forced articulation then you would have half of the problem solved for offroad mode. As the driver's side gets compressed, the air would be forced into the bag on the opposing side, forcing the A-arm on the passenger side to droop. You would also have to shut the valve for street use in lift mode because it acts as a negative anti-sway bar. Another issue is the more you lift the less down travel you have - that is the issue with an IFS anyway. Down travel is the better travel option in the offroad world. "Upgrading" a VX with a gimmicky, stiffer, more expensive, less reliable, non-down travel suspension seemed kind of self-defeating to me. If you think you can figure it out and make it work, KUDOS to you! But the stock front suspension is not a very good canvas to start painting on if you know what I mean.
Sent from my "two hands on a keyboard"