I have a fairly generic MYOG open jet pepsi can stove which requires a pot stand to operate. In some testing, and despite some warnings I've seen about this practice, I've had good luck operating the stove with a piece of 3/8" closed cell foam underneath it. Since the stove itself is not load bearing, any failure of the foam would appear to be incremental and relatively harmless.
Have others had good luck with similar arrangements in the snow? Is there any reason to stop using the foam, like the release of noxious chemicals? Has anyone tested whether there are gains to be had using insulation in this way in warmer temps, say into the 40s F or 50s F, even in the absence of snow?