being a keen photographer i have always looked with envy at rebreathers with there rear or zero gas vent. there was the aqualung mistral which did the same thing but is now getting old and hard to find. what i am thinking of doing is blocking up the left hand air vent on my second stage with a removable plug. on the right hand will be a plug to adapt to a standard BCD hose which i will attach to the regulator hose.
is there something really obvious that i am overlooking or can anyone think of a neater solution?