Pleiades, I've seen it but hoping there is an option to buy something with a map case attached, does anyone make one?

Steve, I've experimented with a similar setup using an old "map case", actually the old map holder attached to the early BMW GS jackets; I found airflow either gets under it or the airflow goes over the top both lifting and making it flap.
How do you get on with yours? What happens when you turn the bars and how is it attached to the tank?