Sure there's a market for it.
But the amount of testing and engineering that went into the Kabuki, led Zen to the design that was released.
He created the Kabuki to unleash the full potential of the Nautilus coils...things like tank capacity have a real effect on how coils perform.
I mean, don't ask me how THAT works, cuz I'll just give you a blank stare and pick my nose.
But I can tell you one thing...go check out the Kayfun Mini v3 thread and listen to the fans rant and rave over the performance of that small 2-2.5ml(?) tank.
Or the fans of the earlier Mini Kayfuns. They have a cult following.
There's something about small tanks that make the coils work better.
Sure it depends on a lot of factors, but we can all be assured that Zen went through every possible option...which included a larger tank. He's a wizard. He created the Kabuki from scratch, and analyzed every possible formula, to achieve the best results possible.
In closing, I think my point can be summed up in one sentence:
@Zen~ didn't arrive at the current design of the Kabuki by accident.
P.S. And sorry Chuff/Ali...that's not to kick your desires in the head. Believe me...I would like to refill my tank less often too. But I won't trade frequent refills for performance. If my Kabuki worked at any level lower than it does, I would have sold it by now.