Air suspension advantage or not

I found out today that the Firestone air bags I was thinking about buying will not work with the custom frame rail kit that I used to install my fifth wheel hitch as it covers the hole in the truck frame that is used to connect the top flange of the air bag kit to the frame. from the inside. This is the frame rail kit




Has anyone had this problem and were you able to solve it? According to Reese it will void the warranty if I drill a hole for the new Air Bag installation.

All of this is making me look to another way to solve the problem. Has anyone had any experience with Super Springs?