Great design. You really got it down to the essentials. The folded tabs as a pot support are really creative. This sort of design could be die cut by a contractor and you're in business.
I wonder how much gain you get with the top section. Have you tried testing with and without? It makes sense to keep the wind off the pot as much as disturbing the flame below. My guess is that you would gain as much as using a lid to minimize heat loss.
I've been experimenting with 4" aluminum flashing using aluminum gutter spikes as crossbars, which can double as tent stakes and digging tools. Ti tent stakes can be used the same way. I've been able to make the same windscreen work with a Brasslite Turbo II-F and Esbit tabs. The pot can sit on the Brasslite stove, or by inserting the nails in punched holes, I can burn an Esbit tab resting on a cat food tin to get the right height. A regular paper punch will make precise holes in the flashing. I gave the flashing a 1" overlap and used a couple paper clips top and bottom to hold it closed. I notched the side to clear the handles as you did. A handle-less pot would require a pot grabber to pull it off the heat while fuel remained. I got a ~5 minute boil time with the Brasslite and their 600ml pot with 16oz/475ml tap water in 70F weather with a light breeze.
The flashing was $0.80/foot at a local Ace Hardware and the aluminum nails were $0.16 each. My cat is delighted to see me buying canned food for Esbit bases :) This same design would easily adapt to Fosters or Heineken beer cans, as would yours, for a totally "hobo" stove and pot combo.