Thanks. As I am sure you can agree with, writing documentation for something like this is hard work. Before even starting to write something, it takes time to fully understand and get a clear picture of how it actually works..
...and I must admit I am still a bit confused if and when the checksum is used. For instance, I find the following two posts stating different things edit: at first look they do seem to give different answers to the question if checksum is considered by default, but on second thought they are just written from different perspectives (see my own clearification in a later post):