I recently got a cannon mold and 2 molds of artillerists for my NQSYW project. I also got an order of metal in from Rotometals. It was supposed to be in the mid-70s until around 11, so I decided to take advantage of the good weather and see if I could get a battery done.
Casting brand new molds always is a problem, but I got them to cast after some careful venting. The cannon mold was used, and cast pretty well once it got warmed up.
So now I have enough for a battery for my Grand Duchy of Waldo force.