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Thanks to Steve for posting the updated rebreather page, and to Eric for
setting it up.  The CCS-100 photo raises a question that maybe Richard or
Rob can answer?  The CSC-100 clearly uses a back bag.  I don't know
what the biomarine configuration is, but from pictures I would guess it's
a front bag system. I understand the cis-lunar uses a front and back breathing
bag for easier breathing.  On the surface this would encourage me to buy a
cis-lunar, but after thinking about it I'm not sure.

Using a front/back bag, it seems like the front bag would almost always
be empty, with all of the gas naturally migrating to the back when the
diver was horizontal.  If this were the case, the front/back issue seems
to disappear; either put it on the front (so gas *can't* go back) or put it
on the back (because it *will* go there if you let it).  I don't see the
point of the over the shoulder front/back configuration unless the diver
is vertical.  Perhaps this is the normal position for cave divers?

Any experiences that could clarify this?

Thanks,
Scott.

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