:reaper:
In MY configuration, i dropped the octo on my primary first stage, put it on my pony bottle first stage.It still has the hi-vis yellow hose.(remains in the triangle) I also hooked my drysuit, and a small,(not micro) spg set off of my pony. this way i always know my pony works & has air.(it gets used) if either of my first stages fail, i can gain buoyancy from my bcd on my main tank, or orally inflate bcd with air from pony. I dive with divers from both methods.(buddy or independant buddy) I still like to provide for myself. This deal with,"this is better and i'll tell you why" still puzzles me.