Thank you for the really helpful information!
Here is where things ended up. I connected with the AOPA legal assistance department. Their belief was that an LLC transfer did require a Bill of Sale and they connected me with a local Colorado attorney to help with that. The local attorney...
Last year I moved to Colorado from California. I also moved my LLC from California to Colorado. So I guess that means the CO LLC is a new entity? (It is not a foreign LLC)
The LLC owns my aircraft.
Because of the LLC change, do I then need to file an ownership change with the FAA aircraft...