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So by adding enviro-seal, does that mean adding chrystolube into the first stage just like Atomics people do it?
The MK5/109 has only 2 LP ports and 1 HP port so it is really only good for a stage bottle unless you want to use port splitters. I like the MK17-G250 off the list. Check with "The Beav" maybe he can give you a better deal. I don't know much about Atomic, so can't help you there.
@ams511, thanks, I think that strikes the mk5/109 off of the the list.