Hi Michael,
Not on your list, but I would point out that as drawn, it's topologically impossible, as the central cannons pass through each other.
Could something like this be made? Actually, yes, if you assume that the cannons are really short (as shown by their fuse holes), and if you assume tha the central frame is a wooden or metal solid lattice, rather than interlaced as shown.
That said, it's something I'd rather sell the enemy than use myself. It's neither aimable nor powerful (short barrel, relatively large ball), and the only way to fire it is to have a bunch of people standing in the central lattice and shooting outwards. Since they have no shielding, nor any place to even duck, using this weapon would be a suicide mission.
Neat design though. Maybe it has some mystical meaning
, with fire going everywhere and enlightenment subsequently occurring, or something.
Best,
F