Jim:
We were briefly in a MEC (Canadian equivalent to REI) store this afternoon and I was eyeballing the MSR Reactor Stove once again (no thanks to your review smile.) Talking with the very knowledgeable sales person there, he told us that the quirky heat adjustibity problems have been worked out since I had purchased my old stove and the newer stoves are much better over a range of output.
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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