@RAINDANCER ，

If I understand you correctly, you mean that once the router is managed by the controller, all settings previously made in standalone mode will be wiped out, right?

This is normal, because once the router is managed by the controller, the controller will send its own settings to it, which will need to be reconfigured in the controller.

Also, you can only choose between the standalone management interface and being managed by the controller.
Once it is managed by the controller, when you try to access the standalone interface of the router, it will show that the device is already managed by the controller.