That cannon is awesome looking. never even heard of one,similar do an early ducks foot pistol. but my 1st thought was the problem they actually had with simultanious firing, just can't see how that would even work today perfectly. everything would have to be made and measured accurate every time you fired. its amazing how many ideas people had for extending the damage of a single shot IE cannister/grape, Chain, shaler bullets, buck and ball. Any other unique experiments anyone know about?
btw Thanks mike for the info, the flaking worries me alot, looks like salt damage that needs electrolisis, which I'm not set up to do. I just like unique examples of different ideas. alan