Hi @Dan.Wills
Welcome to the Sonos Community!
Apologies for the delay.
As Sonos Voice Control works locally on the speaker, it does not have unlimited resources to call upon to figure out what your voice command means, unlike the other Voice Assistants which run on massive server farms. As a consequence of this, we maintain a list of the most popular stations and artists - I think it’s 5000 of each. If your station of choice is not on this list, there’s a good chance that you won’t be able to play via voice command.
However, once a station is added to My Sonos, SVC should be looking there to find a result - but it still has to be able to understand you to do so, and it can take up to 24 hours for SVC to “notice” a new entry in My Sonos. As it has been a few days, my guess is that what’s going wrong is that SVC just doesn’t understand “KBCO” for some reason.
I tried finding the station on my own system but could not - probably it’s geo-locked to nearby locations only - so was unable to test myself.
I did find the following in my reference material for SVC commands, however: “Play a radio station by name, callsign, or frequency” - if you can find out the frequency on which KBCO broadcasts, perhaps SVC will understand that better?
If not, I’d recommend also installing Amazon’s Alexa - it can run on the same speaker as SVC, concurrently. Perhaps Alexa will do better at finding your station?
I hope this helps.