The past few years I have been reconfiguring my Dolphin and it is now CCR with a pair of the new Apeks TEK3 regs. Recently took it to Cyprus and did 8 dives on the Zenobia. Uses approx 20 to 30 Bar of gas per dive. I have put a few pictures here:
SCUBA Diving with scuba2you - click on rebreathers and then the top right image.
Regards,
Chris Bishop
V8 Diver - certified gas guzzler.