Hi Denniss,
Thanks for joining the discussion. I wouldn't use the term nonsense since most of these kits were proposals and from my readings, not all of these Rutstastz made it to production. Most of kits shown were tested on A-5s. I can only find a few instances where some of these kits were used in the field. That's why I was reaching out to others to see if anyone can provide more data, with citations, to help clarify this small part of FW190 history.
HB