Interesting.
ASA never revealed who was responsible for the design, but why didn't Fissore made it public back then?
Can you reveal where that letter is coming from and when it was written?
In that letter, there is written "nostri progetti", so Eraldo Fissore referred to more projects than just one (there is not mentioned that he means the Guardian). So, what other vehicles did ASA made? And is there known which of them were also stolen projects (from Fissore or others)?