Hi all, I am in Ireland, and I have a 1999 Range Rover P38. Pic below is it deflated. It came from the factory with airbag suspension and I'm wondering what it will it take to make this thing bounce, say three / four feet? I don't need the whole car to jump, just 1 axle at a time would be fine (amazing) How many PSI do I need minimum, do I have to use compressed gas?