hello CrazyHead,
is it a good idea to breath your tanks dry one at a time?
when is your turning point? when do you know when to begin ending the dive ?
what if you blow an O-ring on your last tank and the other 3 are empty?
i would leave at least 350 psi in my tanks just in case, mark my reguloators so i know what comes from where, so there will be no doubt i would not wish to take a useless reg in to my mouth when i have no air.
Do you dive with a Buddy? i would be highly advised.
are you streamlined? if you have hoses dragging behind you, one of them might just get caught in something, more chance of accident, you could keep the hoses of the Pony tanks strapped and folded against them so you know exactly where you put them, and have east access to them.
whether its tekkie or not is not an issue in my eyes. if i were that instructor i would get in to the pool with you and help you out with your configuration.
i would take a Strees & Rescue course, if you have not taken one as yet, if only to imroove my diving so i would be prepared to save myself when need be.
also, suitable diving insurance if you have not got it.
a tech course would also help, yes, but im not trying to sell you anything.
life is important mate, if we do things that could put us in harms way, at least try to minimalise the dangers
none of us would like to be part of the statistics.
good safe diving