Judging by your choice of words (enlighten?) it sounds to me like you don't really want to hear an answer. If this is the way you dive don't take it so personally - I realize that lots of commercial divers dive this way.
PSD is not commercial diving. We've got different rules
sheesh
Its got nothing to do with the exhaust valve BTW
Oh, I am soooo sorry to step into your little kingdom of PTSD!
I guess you don't realize that the rest of the professional diving world (Navy, Army, commercial) see PSD divers as Scuby-Doos that usually don't know what they are doing. Who cares how you do your diving, it's always an EMERGENCY, right?
Have-a-nice-day
And Yes, I was really interested in the theory behind your buoyancy control technique, but WHAT EVER!