>>What can you tell me about Trioxane tablets<<

They work fine and have something of a shorter shelf life. Old ones are not as effective as fresh ones, but I still use some that were out of date 6 years ago and am satisfied with them. Little or no residue on the cookware compared to hexy. It might be my imagination, but I think the optimum height above the tablet is higher than the esbit stove stand-off. Try using a portion of a tab - you can always toss another hunk on if the first one doesn't get things warm enough.

Ditto on the windscreen, no matter which fuel you use. Makes all the difference in the world, even in calm conditions. Roasting pan foil and a couple of paper clips; tall enough to reach 1/3 - full height of pot on the stove, and wrapped close to the pot (1/4" - 1/2" gap). Don't forget some air hole in the bottom for combustino air. Cheap, light, and effective.

HTH,

Tom