You can definitely run a centerfire on 1 or 2 concentrators. If you don't need the firepower, just hook up the center. Or, you can sell one of those torches and replace it with a smaller one. "Correct" setup seems to be what works for what you want to do, if your flame flares out enough to prevent warping the face.
I see the sidewinder is a Bobcat center. That will definitely run on 1-10lpm if it produces decent purity.
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Kathy
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