I have had a bit more time for a hunt round the forum. I see that Martin Pegg and Dénes Bernád have published books on this type (one of Pegg's is out of print and expensive s/h).
Amazon.co.uk shows two titles, but there seems to be a mix-up:
http://www.amazon.co.uk/o/ASIN/18578...613482-7203834
and
http://www.amazon.co.uk/Henschel-HS-...e=UTF8&s=books
I assume one has the wrong cover thumbnail. Anyhow, Which book is best for info on Tunisian theatre aircraft, units, pilots, markings and camouflage?
Meantime I have found this on the web:
http://www.geocities.com/CapeCanaveral/2072/SchG1.html
which indicates 5 Staffel of Schlachtgeschwader 1 (or was it designated Sturzkampfgeschwader 1 at this time), equipped with B-2s, so I assume these were armed with the 3cm weapon?
Any further info appreciated.
Thanks in advance.