I just checked the Devardi site for specs and it said 5psi for propane and 5 for oxy for soft glass. 10psi of each for boro. You have way too much propane at your settings. Generally, more oxy gives you a hotter flame BUT I would be careful doing so with that torch. I'm not at all familiar with it and for all I know getting it raging hot for boro could damage it.
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Rebecca
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