QBall,
Don't worry about the cost, get the right piece for the job. This is an area where you might not get a second chance.

I got my system from Ben, and we really like it. It is full time system, where you can also breath ambient air (milling circle, etc). There is a little latch on the side of the regulator that you lock when it is time to race and breath off the bottles.

The mic's he installed have worked perfectly and we will not get in a canopy boat without our masks. In fact we brought them with us when we raced Chris's boat in St. Pete.

best wishes,
Rick

Thanks everyone...I found the system I was looking for. Ryan..you are the man!!!