I set out to make a solo backpacking cookset that
and I've essentially gotten there, or close enough.
Here it is, ready to boil:
And here are its parts:
Clockwise from left:
The only tricky part to make was the ring around the tallboy which allows the Asahi can to hold it above the stove. That's the outer part of the Asahi can top - basically with the whole flat middle part removed. To cut that out (lacking a lathe), I drilled a hole in the middle, mounted it on a bolt, put the bolt in my drill, and spun it while cutting with a utility knife.
The ring was just the right size to compression fit over the tallboy without easily moving. (Otherwise I'd have used a spot of JB Weld.) Since it's from the Asahi can, it slips right into the windscreen and holds the pot pretty straight and centered within it.
Originally I punched more bottom holes in one side of the windscreen for better wind protection, and since the stove isn't pressurized, it burned off-center (causing some of the scorching you can see - but most was due to a different stove I tried in it). So I punched more holes evenly around it and will use the bottom piece of foil curled up on the windward side to help protect against wind.
It the quietude of my kitchen I got 2 cups from 22°C to boil in 9 minutesw with 1/2oz of ethyl alcohol in the tealight cup. Burn time was perhaps another minute.
The whole shebang weighs 1.32oz; observe:
So I missed my goal just slightly, but I think I could get it down to 1oz by doing these things:
The most obvious problem I see with this cookset is its fragility. Here it is ready to pack:
Obviously a protective case will blow the weight budget, so it's more practical if there's some naturally protective place for it to be stowed. Of course it isn't that fragile and any crushing could probably be fixed in the field.
Another issue is the lack of a pot holder. You'd need to use gloves or a bandana or something to pick it up when hot. You can pick up the whole windscreen-pot assembly at once and pour out the water - that works fine. If there was a need to remove the pot from the windscreen, a strip of aluminum epoxied to the pot as a bail would probably be worth adding.
Also, the ultralight lid will be tempted to blow away in any kind of wind.
The stove hasn't been tested in windy conditions.