Sheesh, I think i saw the most errors ever in some of those previous messages. First off, Centerflag makes the dynaflows and hyperflow regulators. The 201 is the high end hyperflow made out of steel. Centerflag also makes the dynaflow, which i believe is just an aluminum version of the 201 except they make these for diablo direct (im pretty sure DD does it, but im not positive) who distributes them. The hyperflow 201 is the actual regulator, not the tank. As for the apocalypse, you were way off... they are made by Air America.
Check our their respective sites, http://centerflagproducts.com
hmm, i think that pretty much covers everything. but yeah, all three air systems discussed here are absolutely great systems. The only thing is that the apocalypses are made out of steel and i hear they are quite heavy, also the on/off is extremely hard to use. other than that they are great.