Verve I have the poly-air black bags on my ute and they work well. They look similar to the Firestone Ride-Rite airbags setup. On the Poly-air set up, there are two plates that the bag sits in between for normal ute height. For the XR lower ride height, the bottom plate is left off and allows for the more limited movement for the lower ride height. All airbags must run some air in them, even just 5lb. My everyday gross with just rack and tools, is just over 2T, and 20lb is about right to bring it to std ride height. You will never use 100lb on the polyair ones on a falcon, as just 30lb will increases the lift to about 500kg extra load. NB this is with Polyair and the XR setup with bottom plate removed, as recommended by Polyair for std XR setup. Mark