I said where I read it about 12 years ago yet when I said where I read the info I was asked where the source got its info. Arguing with a name Im gonn a drop it because if I looked further ito it I would need the paper from the RML to satisfy you and it not that important
It's not about picking on you Digr1, it's about getting it right. One source is never enough. Squadron Publications are good to a point, but they get their info from a variety of sources and aren't always accurate.
One of the best known of the early WW2 aircraft experts, William Green wrote some stuff early on about the 190D9. Because it was William Green, folks took it as gospel and quoted it often to the point it got to be fact. Then some folks who were specifically interested in the D9 started to dig deeper and couldn't find any other confirmation of the info beyond William Green. Turns out he was wrong. Not deliberately, but he'd gotten the info wrong to begin with.
Once source is never enough, in particular when it's just a general history like the Squadron Publications stuff.