Update -
I checked the thread that was suggested by MiloMorai -
There is a theory that could have been unlocked at unit level for more experienced pilots, but, butch2k has specifically commented that he has yet to a see a single photogtaph where the actuating arm for the Flettner is present.
So looks like yes fitted (suggested 200 or so aircraft), but locked down, no actuating arm fitted. Perhaps it was going to be utilsed at a later date, but the war ended.
Whatever reason thread is a good read.
Unless....someone has any pics