Two last things.
One, if you're going Aquatek, you're going cheap. Very cheap, in fact. A couple of us have pointed that out, though you keep repeating that you're trying not to go cheap.
Two, the comment from exv152 about the paintball cylinder was relevant to your question, as the regulator you're talking about is designed for paintball tanks. And since it will likely be difficult to find an adapter to go from a paintball connection to a CGA connection (not the other way around, those exist), it's quite important for you to consider the pros and cons of a paintball cylinder. No need to yell at a guy for pointing out something you seem to be missing.