Hi,
hope you are still out there....
I actually developed the same idea some time ago with slightly different intentions : Using an oxygen-chamber-tank might also make transpersonal experiences more probable like hyperventilation, holotropic breathing etc. do.
People using a hyperbaric chamber therapeutically also report amazing psychic states like deep tranquillity, no boredom , no need to move etc.
Let`s build it !
Please email :
Usul2002@gmx.de