I badly want to try replicating the study in which a person was breathing 50% laughing gas, 50% oxygen for 1h. Did you, OP, try only what I understood others call as whipping or what was your method?
Ive used whippets but they’re really inefficient. I moved on almost immediately and got a 10lb nitrous tank. You can do what that study does pretty easily, Ive got a nitrous tank and an oxygen tank at home. You could get a months worth of every other day therapy for $200