Quote: (Originally Posted by
Genesis)

(2) I've yet to see an OC instructor talk about the finer points of buoyancy and trim control; perhaps its different with CCR instructors, but I doubt it.
I suspect all I'd have become is poorer AND I'd have learned things that might not apply ot the specific rig I dive.
The notion that you haven't seen it, doesn't mean it's not out there. All of my instructors - starting with basic OW in the late '70s discussed breathing as a component of buoyancy. Each rung up the ladder got more into detail on the topic.
I've suggested this before, but if you approach a relationship (any relationship - but for the purposes of this discussion an instructor/student relationship) with the clear and open attitude of 'you're just going to rip me off and I won't learn anything' then one should expect to find exactly that.