(1) Has there been any new news in the last few weeks about AMRB's (= automatic mixture rebreathers) and other mixture rebreathers? (i.e. price; makers; when likely in the shops; etc) (2) It is said to be possible to run the Prism with different gases in its two cylinders. If these two gases are oxygen and diluent, and as the Prism is said to be modular so that different parts can be put together for different purposes, when and if a reasonably cheap and <reliable> automatic controller for AMRB's is designed, would it be possible to design such a controller that could be added to a Prism to make it into an AMRB without having to hack the Prism's basic construction about? (3) Of the various makers of AMRB's and other mixture rebreathers, do any of them (as far as is known) read Techdiver?
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