[ceph-users] cephadm:: how to change the image for services

Hi! How/where can i change the image configured for a service? I tried to modify /var/lib/ceph/<fsid>/<service_name>/unit.{image,run} but after restarting ceph orch ps shows that the service use the same old image. What other configuration locations are there for the ceph components beside /etc/ceph (which is quite sparse) and /var/lib/ceph/<fsid> ? Thank you! Adrian