Double D,
In answer to skip77's question, you have written, "Any cannon that meets the criteria........."
What is the criteria for this "Black Powder Cannon and Mortar" board?
I don't believe the gentleman's question was answered and he doesn't want to make a mistake.
He may assume that the board is for Black Powder Cannons and Mortars; not for carbide or Quaker guns.
Perhaps a reference to a sticky is in order?
rc