Hello,
Thanks Wolfgang. I only went with ZS.2 as the same seller had on offer at the same time some photos of Bf 110s (see above),at least one of which was a possible ZS.2 machine, but on reflection, no doubt you are correct and if I had more information they too can be shown to have flown with several possible units.
Meanwhile on 06.02.21 here are some more trainer photos from the same seller:
Praga E.241 NG+ZC
https://www.ebay.it/itm/FOTO-BEUTE-F...0AAOSwmLpgHuky
Focke Wulf Fw 44 BB+EJ
https://www.ebay.it/itm/FOTO-FW-44-F...gAAOSwbjNgHuRI
Regards,
Clint