Lee danced:

>Here's the reality, again.  I do what I say I do.  With no gas in my wing,
I 
can descend, stop my descent stay relatively stationary and ascend, at
will,  without finning.<
 
'Relatively'? Would you be willing to demonstrate that in a test without
fins? 

I'll run it by you one more time:

your tank contains 6lbs of air. Since you need to weight yourself for being
neutral at the end with an empty tank, you are therefore 6 lbs negative at
the start of the dive. So you don't plan to come up empty and fudge it.
Then you still must be 4lbs or so negative at the beginning. At the risk of
not being able to do deco without kicking head down. OK. 

So we still get (assuming your tank doing -2 to +2, and of course -4 to +-0
yields the same) 
-2 + X = 2
where X is your lung = 4lbs

A normal breath inhales/exhales about 0.5 liters = 1 lb. But you have no
trouble ventilating multiples of that. And it doesn't even affect your air
consumption, as you would have us assume. 

>Twist it any way you care to, it does not change the fact that I can and
do 
what I say. Sorry if you can't.  Keep practicing.<

Yes, master. You claim to do all kinds of things on the net. 

m