From the above, and from attempting, you can not update a post using “cooked” as the API documentation states, it is however possible with “raw”, all attempts I made using “cooked” kept giving me back an error that my post was invalid as it was under 20 characters, or not a clear sentence …
However there are additional issues with “raw” that I will make into another post as this isn’t directly related.
Thanks for all your help.