Probably not the best way of doing it other than the drill but on a couple of my TS 250/1’s I resorted to knocking it back through the barrel shaft using a punch and hammer!!!!! On mine I got the plate cover off first levering the pin out the barrel, can be knocked back with little damage. I have no idea if the ETZ is different from the TS’s so if I were you I would await other replies (just letting you know of my experiences) or resort to the drill ( I have done that too)!
Regards Stuart