note on tailscale

user-guide/30-Advanced/02-remote-access/03-tailscale.md

@@ -17,12 +17,20 @@ Tailscale is a really really cool service! You may find yourself using it for ot
 4. [SSH into your leader Pioreactor](/user-guide/accessing-raspberry-pi). Install Tailscale for Raspberry Pi with the following: `curl -fsSL https://tailscale.com/install.sh | sh`. You don't need to install anything on the workers.
 5. Back in your [Tailscale admin](https://login.tailscale.com/admin/machines), you should see two machines: your computer and the leader Pioreactor. Make note of the ipv4 address for the leader - we will use it below.
 6. You should still be able to access `http://pioreactor.local` without any problems.
-8. In your config.ini, add your ipv4 address to::
-```
-[mqtt]
-...
-broker_address=<ipv4 address>
-...
-```
+8. In your config.ini, add your ipv4 address to the `[mqtt]` section:
+   ```
+   [mqtt]
+   ...
+   broker_address=<ipv4 address>
+   ...
+   ```
+
+   If you have other Pioreactors in your cluster: you likely won't be adding those to tailscale (only adding the leader is necessary for remote access), so in each of the worker config files, add:
+   ```
+   [mqtt]
+   broker_address=<leader name>.local
+   ```
+   And save. This means that your workers will connect "locally" (over the local network), but the UI and will connect "remotely".
+
 7. Now, when you leave the local network, and if you have internet access, you can turn your VPN on and still access `http://<ipv4 address>`. Troubleshooting: try `http://<hostname>`, but confirm that magicDNS is on, too.
 8. You can use the Tailscale admin to add users to your VPN, too.