Junos Space Push Massive Configuration Changes

Anyone use Device Templates on Space to push config changes to multiple switches? Have a Juniper customer that used local authentication, no NTP, default SNMP, no syslog, etc... on all their switches. Basically I want to push a change in password, set up authentication and other best practices on all the edge EX switches. Any links, videos, advice for utilizing Space for this function? I've never used the product before but the customer has it up and running with most of their switches discovered.
Thanks as always!