Rebreather Purchase question

[Chuck_Northrup]

Check the DIR site for the RB80 answer.

Carrying OC travel gas with a low FO2 source gas has been done in the past, but by doing so you loose the RB advantage for ascent and descent. In addition all orifices available for the Dolphin are calibrated for sonic flow using nitrox mixtures, not trimix. Using helium will result in a less predictable flow rate and a less reliable FO2. It kind of gets back to the different RB's as different tools aspect. If you want to dive 200fsw don't do it with a Dolphin.

What amazes me most about the homebuilders and modifiers is that many of these guys take a $3,000 rebreather, put in $5,000 worth of time, tools, and machining to achieve a RB unit that can "almost" rival commercially available CCR's which cost less and reduce the "guinea pig" factor.

Chuck