Don't disagree but you are not the average diver. The "average" diver would not feel the slightest inkling of difference between most regulators. Sans a double blind test, this is all "look and feel". It's the double blind aspect which makes the test relevant. I think that the feature which improves breathing the most is price and how much better you feel when your regulator gets admired.It wasn't double blind, I'll grant you that. And it wasn't multi-brand. But doing an all-position, "eyes closed" pool test, switching back and forth between regs multiple times, I could feel subtle differences.
A bit like a paper bag comparison of your two favorite "identical" Bordeaux wine blends. OMG are they different!
Long story short: I sold my A700.
Post in thread D420! How about that?