Gearing up the now operational M1 rebreather setup with a 1kg scrubber in pure O2 mode. The unit ways 23kg with full 20cft tanks (still too heavy for my liking).

Standing in the pool with the unit.

Showing the PO2 monitoring for the camera.

Back of the unit on the surface.

My first plunge below the surface on a rebreather, with camera in hand to take a photo.

And here is how that photo worked out.

Injecting O2 into the counterlungs...

...and then watching the response on the PO2 meter.

Signaling that everything is OK. Note the lack of bubbles.

Testing the bailout onto onboard open circuit via Tusa Duo Air (same thing as Scubapro Air2). Note the air bubbles.

Bad photo of me hovering mid water on the rebreather.

View of the unit from the top. Its clear that the hoses are too long and need to be shortened.