Thanks for the tests / review.

I have the Primus Litech Kettle / pot and really like it. When I purchased it about 2-3 years ago, I also looked at the EtaExpress pot you tested and decided at the time, that the addition of the heat exchanger and subsquent extra cost was not worth the investment to gain only 10's of seconds of claimed heat time.
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Earth and sky, woods and fields, lakes and rivers, the mountain and the sea, are excellent schoolmasters, and teach some of us more than we can ever learn from books.

John Lubbock