Nice to have those options, bummer you have to choose.

Welcome to Rebreather World.
Tough call to make. Several MK15.5 owners have switched rigs,
including to the Ouroboros. Frequently too hard and too expensive
to find spares, they are finite. From what I understand Colkan doesn't
make new parts, just assembles from the stock they have.
I still find the MK15.5 one of the most appealing CCRs ever made.
