i'm not entirely convinced the variable volume fire chamber on the epihany isn't a little gimmicky...
if small volume gives quicker recharge, why not just design the thing with a small chamber in the first place?
what advantage would there be to a larger chamber? i guess it gives a lower operating pressure - but is that really needed?
when you are looking for a tourney marker that can shoot fast and consistently are we not just looking at how quickly it can recharge and therefore cycle?
i know, i haven't answered the question, but it gives you something to consider....