Well Sir? Are Your Sappers Done ?

Yes sir! Ready as ordered. You may commence your battle sir.

 No more marking off one third of my table. The trials have been done and done, a decision has been made, tested, tested again, and again, confirmed, and finally carried out.

4'x4' or 9x9 5" squares with a narrow border

If/when I want a larger table for a special game or to test a convention game at home, I'll add a temporary extension.

Now for a game or three!