Originally Posted by
airoli
It is not risky, it is impossible. You cannot check bags at an intermediate station (ZRH) before the first segment of a ticket, to that station, has been flown.
Thanks airoli, extremely useful! Looks like the next best option (as there will be plenty of time in the evening before ZRH-XXX) is the ZRH baggage storage for the duration of ZRH-EU and EU-ZRH flights.