Beautiful work! The mountain howitzer is a very user friendly gun, easy to care for and feed; I had a full size barrel turned by a machinist friend, my cost was approx. $700 and providing the steel , (1040) which I picked up in Tulsa OK; IIRC it ran about $225, so for less than $1000 I had a turned, bored (2 3/4") barrel without trunnions. Got the steel for trunions for $40 and my friend turned them for something I traded (I had also bought a spade bit to bore the gun with, which I donated). I really liked it but family obligations forced me to sell the finished barrel unfired, years ago. I would like to build a 1/2-3/4 scale gun, but being disabled my finances are very tight.Perhaps I can find a barrel to trade for? The OP's gun is a very well made 'Prairie Carriage' with great woodwork, and I'd consider it worth quite a bit. A friend bought a well used MH on an Eagle carriage with a Factory cast and lined barrel for $2500 a few years ago, and is very pleased with it. It has a 2 1/2" bore. I would imagine a new complete gun like that shown would be worth in excess of $10-15 K. George.