@halfrican.ak and @njanda
Here's an example of me creating a Custom Command using Rule Machine.
Thanks to @destructure00 for the tip about selecting the device type as Actuator.
So I have a Rule run a custom command to set the volume to 80 (video shows 90)
then another to speak the message
I link to my TTS Finisher Actions which set the volume back to 60 and issues Stop() to get the silly remote icon off of my Home Hub.
Enjoy let me know if I'm doing something wrong.
I'd love to make some demo videos and things like that.