With snakes, the stack is the base temp and a side or only the top layer is the heat source, which means a very small heat source.

The stack or mass has to include the cool mass. Folks here, heated the whole stack and then wonder why it doesn't work well or at all. The stack or group of crevices, are suppose to have a range of temps from cool to warm, not warm to hot.

In practice, this is so very easy to do. Just use small heat sources and try heating one side. There is a scale to this, the hiding areas need to be fairly large. At least large enough to include a range of temps.

One example posted here had a tiny stack under a large heat emitter. Exactly backwards of what it should be. Anyway, thanks for the great question. Cheers

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