What happens if when the valve sticks, the good year tire man will shoot to the surface like a cork. If the inflator on your bc sticks, it is much easier to control, and vents air more quickly than a full dry suit. I guess what I was trying to get at is, don’t tell this to a new diver. Using your dry suit for primary control can be quite dangerous, your dry suit was intended to keep you warm, dry and releave squeeze, as i said I don’t know of any agency that endorses this technique, if you find one let me know. Until then you should learn to use you equipment as it was intended. Would you use one of your back up lights as a primary light going into the dive?