A lot more variations can be made of the Flanders mesh than are applied traditionally.
In her book "Tierisch Flandrisch" Inge Theurkauf, guesses the number at about 6300 in the English text and 6500 in the German text. I'm afraid she took 3 (cloth stitch, half stitch and cloth stitch and twist) to the power of 8 (stitches) which gives 6561. But the opposite corners are equal. Thus remains 3 to the power of 6 which gives 729. But adding Ulrike Löhr's omitted left or right twist, we get millions. And as we are already experimenting, why not mix the open and closed method...
It would be impossible to publish examples of all variations in a book. Thread drawings can help a lot to avoid mistakes with exotic combinations of stitches. But not everybody can easily make them. So I thought: "How do I tell software developers how to generate the drawings?" Analyzing the problem I came up with a template for pencil and tracing paper, which I could use to construct a generator. The manual trace work that remains is give each thread the desired colour, for those who want to make lace with mixed colours.
Follow me in the adventure, vary with colours. It might take years but updates will follow. Send me links or scans of your own experiments.