1. Presently, I have no "mounting" for use of the backboard as a cockpit table. (I did mount the hardware so it all fell between the battery boxes.) I have not envisioned the backboard being used as a cockpit table when underway, only when at rest and in calm waters.
I have thought of cutting a couple of smaller pieces of the non-slip rubber material we all use, to place under each end, to keep the board from sliding.
Do you have something to suggest?
2. As explained in my original post (see above), I simply slide the "chopping block" along the table top under the bottom of and behind the backboard. When it reaches the back edge of the table, it automatically "falls down" onto the table leg, which raises the front a couple of inches and puts the edge square against the bottom of the backboard as it is tilting outwards.
I have only had the board fall out of this final resting position one time. But I have thought of adding a wooden "cleat" at the top of its position, as well as possibly another at the bottom--creating a slot for it.
Though amazingly simple, it works amazingly well