You can set additional SSHd options like code below, see defaults of ssh_config role.
No need to make additional config for ```hetzner-balancers``` because access list will be inherited, only admins accessible.
**Using master key**
Warning! Playbook will delete all public keys in root's ```.ssh/authorized_keys``` file and setup own **super** key, only after this public keys in group_vars and host_vars will be added into assigned users ```.ssh/authorized_keys``` files. If you do not want to lost already installed pubkeys then add all of them to this playbook before first run.
**Security issue!** You need to generate your own super key! Run ```ssh-keygen -f superkey``` and replace keys in ```secret/``` directory. DO NOT USE DEMO KEY!
Read documentation on wiki pages here https://git.blindage.org/21h/ansible-ssh-management/wiki/