Thank you Duncan!

Your Youtube video https://www.youtube.com/watch?v=RhOUCyNVLHE saved my day. I was confused by Principle's UI's Messages from Parents when we actually needed to send to the parent to route to other components.

The prd source files you uploaded were super helpful as well. I just have a tiny suggestion to rename "message 1" to "load coffee" in your component-to-component file to make it consistent with the other two files.