Franco, it looks like a clever design, but I have some doubts/questions, are you saying that:
1) the aluminum is in contact with the pot and that there is virtually no air space b/t the pot and wind screen?
2) it actually boils water faster than using a wind screen with a 6-12mm air space between the pot and the windscreen? I would have thought that it would boil slower with no air void between the pot and windscreen - especially in calmer conditions. What was the difference in fuel consumption with your windscreen and a more conventional one?
3) have you seen DrJ's design for using a pie plate with cut-outs for the pot supports and burner head as a bottom for your windscreen? This also protects the gas canister from overheating with possibly catastrophic results.
4) what was the diff. in boil times and fuel required to boil with and without a windscreen?
5) in actual use you still use a cover on your pot, right?
[Note: Boil is a useful way to compare approx. performance, lacking a thermometer. While talking boil here, some might remember that my older posts mention heating water to only ~180 deg F/~82deg C to save fuel, except if attempting to purifiy water, which, then, of course, a short boil is often required - depending upon the "bugs" one hopes to eliminate. 180F/82C is very hot. There is no way a person can even sip water this hot - at least I know that I can't - it burns/cooks some tissue of my tongue and hard palate. After heating water to approx. 180F/82C, place pot/bag in a cozy - generally only addes a few minutes to time in the cozy, but saves water heating time and fuel.]