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Thank you all for the kind comments.Bill, you are lucky! This is a B20 engine kit made by Andy Ross. Here is the one of Andy himself:https://www.youtube.com/watch?v=402tNFGY23QThe intention of these kits was to get people to do experiments and development work on small Stirling engines. But this turned out to be difficult and so the production of these kits was discontinued. As Ian said, it will make a powerful little Stirling engine. And if you have any particular questions about the kit, I think too Andy Ross will be helping you.Plani