Silent (Soylent) Green is the chest mounted CC rebreather I built for Culiembro and other projects. Based on Dolphin parts with bits made by Tecme it ended up being a 'kit' rather than a home made rebreather - which suited me as I had not access to a machine shop or lathe.

There is a single counter lung on the exhale side, next it the O2 addition just before the Dolphin scrubber. On the inhale side is a sensor housing for two cells - one read via a Marc Munro style ppo2 display and the other going to my VR3.....  

The O2 is fed via the hydrogrom CMV valve available from Techme and I've got a 1.5ltr Argon bottle to run the breather. Diluent is added via the Dolphin ADV, which has an Apeks gas quick connect on the end. 

It attaches to my sidemount harness and a crotch strap holds it all in place neatly.