Chris, you are right concerning the use of the bomb, it was depending on the target.
Concerning M11, it does had the possibility to have the Fritz X under the fuselage, I just sent you a PM with a drawing on this topic.
And, no, I don't have - yet - your book about the Do217. May I order one now ? with your signature please, we will exchange PM on this topic
Best regards and enjoy la France
Gilles