Udet U-12, Hungarian and Austrian version

Both Hungaria and Austria build the Udet U-12 under licence.

In Hungaria they redesigned it in 5 new versions, the Hungaria I until V. I only have a list with dimensions etc.
Now I hope that you can help me with more information/materials, 3 side view drawings of these 5 versions would be very welcome?
I read somewhere that they also put machine guns (nose) on the U-12 or Hungaria and bomb racks (experimental of for practice training?).
Who can give me more information pictures of this?

In Austria they designed a new fuselage, steel tube, and this version was called U-12S (Stahl) and U-12O (Osterreich).
Now I am interrested in details of the construction of this new fuselage, who can help me with drawings and/or pictures which shows these construction?

Jan