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A solution that meets all of your criteria (with the possible exception of being robust) is a DIY cat food alcohol stove used with a DIY Bushbuddy-style gasifier stove. Both are easily and cheaply...
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A solution that meets all of your criteria (with the possible exception of being robust) is a DIY cat food alcohol stove used with a DIY Bushbuddy-style gasifier stove. Both are easily and cheaply...