Glad to help.
If you've got a 4-stud Scorpion, you can use the concentrator on the inner fire and the tanks on the outer. Get a foot pedal for the outer fire and a tank will go a really long way. The inner fire will run better if you can score another 5lpm, but more than that would be overkill.
*edit*
To do it, you just hook the inner flame's oxygen post to the concentrator, and the outer flame's to the tank.
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