I'm in the middle of doing a 1/4 scale one. Have the breach end done and have the barrel about 90% ready to attach. I'll just have the pieces where it attaches to the carriage. Still looking for drawings of a carriage so I can make one for it then when I find the wood to do a full scale one, I'll build one for it.
It is signed on the base so it doesn't get mistakened for a real one unless they change out the sabot.