Updating the config on a running machine

I have installed RancherOS on to bare metal and everything is running great. But now I need to modify the original config to add additional network mounts and remove some services.

How do I do this while avoiding a full reinstall?

Thanks

the ros config command should do what you need -
http://rancher.com/docs/os/v1.0/en/configuration/#manually-changing-configuration

Thanks. Can I just update the config.yml and reapply it or do I have to do an update for each item?