I use a zen mini stove and it simmers just fine if you block all the holes. Makes great rice and will burn for over 25-30 minutes. A piece of aluminum foil and a paper clip work just fine. Note: I do not use the stove as a low pressure side burner but with about an inch between the stove and pot.
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If I wouldn't eat it at home, why would I want to eat it on the trail?