jack,
Here is a picture of the torch I just bought from a member of this forum you know as none other then Mr. Smiley.
http://www.glasstorchtech.com/mirage.html
This is an even bigger torch and show the inner and outer rings.
http://www.glasstorchtech.com/delta.html
I plan on using 2 concentrators I have right now to power the center ring and tanked oxygen and a foot pedal for the outer ring.
I'm hoping that those cyclone I or cyclone II that your distributors will be selling will be enought to power the outer ring so I can be oxygen tank free.
Robert