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I know. I would have bought a hardback, but they are out of print and I don't fancy paying those prices just for collectible value.

It's a free pdf. You can print it if you want paper. I did :)

My advice is simply to not overthink this. Really.
You have a large volume with some wire or a metal pipe to hold the blade, and a bit away from that you have a torch flame coming in. Charlie's one...