[birder]

This is how I make the cannon, there are 10 to be made, I card tube to start mine were 110 #card, easier with typing paper(but can end up not as straight) or 65#, ran out of 65# for the moment so used 110 I like how stiff the tubes were when glue dry, then added two typing paper layers, then rolled thin trim of paper strips for details, they won't be all identical but will look pretty close, a bit of trim sanding if needed at rolled edges and at the tip and breech (where a toothpick tip was glued and sanded round).