Here is a 1/3 scale Mountain Howitzer prarie carriage I helped someone with. They made their own brass barrel and purchased 18" wheels for me to use. The wheels are well made but are not dished.
At my friends request, I modified the carriage a little to accept implements.
It is his intention to trim the ends of the trunnions to fit.
Enjoy the pictures.
Zulu
Michael Elledge