Snakebite, I am using Boro COE 33. That particular torch is a Bobcat. I have a bigger torch but I like working on my Bobcat. I also teach people to cross over from 104 to boro and I like showing that smaller torches are fully capable of working boro and striking color.
I also teach 104 off mandrel techniques and I have made these wings in 104. I have not made them on a HH but there is no reason you cannot. Just scale down a little bit, be mindful of your heat control and where your flame is touching the wings.
Good luck and have fun!!
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