What must be done to adapt 1st. stages when the planned MOD is in excess of 100M? Assuming that I will have to crank the intermediate pressure up and that I use higher pressure Intermediate pressure hoses and stronger springs in my 2nd stages - what intermediate pressure should I shoot for? Can I then also use these regulators at lesser depths? BTW I'm paying @ $1.15 per cu ft for helium in Germany, what is the wholesale price for helium in the USA? Michael Fisch
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