Mikkel,
Me too I was very interested on the combats of 11th April 1943, for other reasons, as you can see on previous threads on this Forum:
http://forum.12oclockhigh.net/showthread.php?t=10330&highlight=Wilhelm+Baumgartn er
http://forum.12oclockhigh.net/showthread.php?t=7569&highlight=Wilhelm+Baumgartne r
http://forum.12oclockhigh.net/showthread.php?t=7901&highlight=Wilhelm+Baumgartne r
http://forum.12oclockhigh.net/showthread.php?t=7902&highlight=Wilhelm+Baumgartne r
You helped me with details I did not know. Thanks indeed! Would you have a photograph of Sorensen?
I am traveling this week, but will return home on the weekend. We will communicate further.
Thanks and do hope the links will be of interest for you.
Adriano Baumgartner