During the American Revolution, Principio was one of the few places in the Country (to be) that could produce cannon. It's a few miles from our house. It was burned by the British during the War of 1812.
I bought this fort from Brigade sans cannons, and have taken it upon myself to produce 32 pdrs for it. This is my prototype. I'm going to try to go smaller.
Attachment 43594
Attachment 43595
It's built with a bit of U-channel for the carriage and round rods for the wheels and barrel.