In all but one of the autocascade diagrams in this thread, the low stage gas doesn't actually pass through a drier/filter at any stage. Does this matter?, I mean will the lower stage not carry moisture?, if that's the case fair enough, but there's still a risk of the low stage gas carrying contaiminates isn't there, although they should fall to the bottom in the seperator and go thru with the high stage gas I guess. Would anyone like to comment on this?