Mike I saw your ad about the C02 scrubber. I could build you a scrubber if you really need one. You would have to let me know what the dimensions are so I would know hw much C02 absorbent would be needed for a specified dive time. I build my own rebreathers for scba diving and so I know what I am doing. Please let me know. Max Kruschka catbreath444444@aol.com (703) 690-6569