Hi, Why is it that some people who seem to praise the jetstream regulator fit a cyklon second stage as an octopus? :-) For this to be done correctly then the flow rate of the first stage should be changed to that of the cyklon 5000 (down from 1800l/min to 1000l/min approx). A simple modification in the first stage. The reason for this is that the cyklon second stage wouldn't be able to shut it's self off against a flow of 1800l/min or there abouts. So perhaps these people have cyklon 5000 regs with a jetstream octopus:-) (and they're breathing from the octopus!(thats another story)). Now if this is the case then the intermediate pressure also has to be changed to suit the jetstream octopus and thus job done. So now the reg isn't as good as it might have been :-). Confused? I'm not! Keith :-) -- Keith Bellamy