hi folks
does anyone know if i can do this and how i would do it using a tram stop ticket machine?

scenario as follows:

i have a 24 hour zone 10 city pass but want to go to kilchberg and back tomorrow - can i buy some kind of zone extension to cover the kilchberg leg of the journey - i intend to be in kilchberg for more than an hour. I will be taking the bus to kilchberg so need to get the zone extension from a machine rather than station ticket counter.

any help greatly appreciated.

all the best
JK