What did your instructor say about her using the OxyCheq cells? Any comments?
Where does one find a RB instructor who is actually an expert on the RB that they are teaching? Most Instructors I know can instruct on 5-6 different RBs but only instruct on the RBs that they are currently selling. Crossing over as a RB instructor from one RB to another RB is usually done in about 4 days, but can take a week.
Do you really believe that your expert, with a weeks training, knows everything about every component or possible substitute for it, that is mounted in your rebreather? If so, why isn't he a full professor at MIT, Stanford, or CalTech?
Michael