Replicating Routerboards

I needed to mass-configure MikroTik Routerboards. Each needed a very similar but not identical configuration: they would have a unique management IP, and a unique username and password for their VPN connection back to my employer's headquarters. I don't have time or desire to do this routine configuration myself, so I needed a method that would let a less technical person do the work.

You can back up and restore RouterOS configurations, but then I'd need to have the user do all sorts of...