g/day fellas, has anyone out there had anything to do with coil helper springs that fit in place of air bags? first time i have seen them was in opposite lock in mackay. at this point in time i have a set of air bellows and we are not happy at all. we only run 22psi with the van on and they give a very ruff ride. tried them at40psi and no difference. want to try these coils. Any thoughts would help. regards melly