Just been on the Air America web site ,on it they have Geddons with 3000 p.s.i and 4500 p.s.i is there any difference between them.What i mean is i have a geddon with a 1.9 botle 3000 p.s.i if i get a 4500 p.s.i botle for it will it be ok,or do i need to change the Geddon as well.