I think I have a similar Scubapro in route in a bulk buy of parts I made...If I remember correctly, a company called IDI out of California made a regulator that had a similar tube / venturi configuration like the one above in the early 80s. I worked at a store that carried them as a 3rd tier regulator brand. They also made the IDI power fin which was popular because it copied the jet fin and had a huge xl fin that worked well with the boots that were becoming popular on drysuits. The Turtle fin pocket was a copy of theirs i think.
Herman, if you are reading this, do these regulators take the same main diaphragm as the early Healthways we were discussing? If so I could reproduce it as it would obviously fit the Healthways and the Scubapro 108s. Guess you better send me that diaphragm if the offer is still open?
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Doing it right should include some common sense, not just blindly following specs and instructions. .Gary D, AWAP on SB