Heatshield was definitely compulsory in above design, however, I suspect many others (who don't know of 50C test) would be unhappy on seeing it, given the dire warnings on stoves, limiting where this design can be used, and as I have fixed the stove's pot support to my liking, I may stick conventional support and other ideas, at least some of the time. On the other hand, if cone doesn't support the pan, then if could have more ephemeral section around cannistor, just like the tripod idea...
Actually the c(l)one wasn't done from your script, just "on the fly", but I did use an old clone template for the tab joints.
Kevin and Roger:
I could cut more (triangular) exhaust vents:
The cone was meant to be more conic/wider at top for better exhaust, but the source foil tin was too small.
Given their own warnings maybe manufacturers should give a foil heat deflector with each stove.
I still like the previously mentioned tripod idea, similar to the Bivoac stove above: if stove manufacturers insist on such warnings, then I think they should sell proper lightweight windshields like that, that enclose pot properly, leaving cannister protected (by heatshield) and open on all sides for cooling. And when the cannister hangs from stove, lighter,cheaper aerosol cannisters can be used: I suppose, alternatively, I could make foil conic stabiliser (from Kevin (Beeden)s clone script) to allow use of narrow cartridges with top stoves.
Or I could stick to meths, if I could get a civilised easily adjustable simmer...
(why do meths bottles fail to mention that you can extinguish it with water: seems rather useful info...?)