DoubleD,, Machining is part of my work. When I mentioned shooting black powder 35 years, back that far I also built cannons, turned them in highschool shop metal class, made flintlocks, forged knives and it was before I drove a car(legally anyway) I just love the work, always did. :-D I make knives that vary from centuries old methods to very modern and modern requires some machining. At times my firearms manufacturing requires machine work also and again I build 1700's period fusils to modern Fnfal and Ak's. While small cannon is "sort of" hobby machining and gives me a break from gun and knife building (dirty job but someone has to do it) the cannon was actually a commissioned job but my design entirely. I do them on very special request only. I have been asked to do a space age looking cannon recently, can't wait to see the basic plan. Yes been to cannon mania and a few other cannon sites, love and enjoy the work out there by some very dedicated, skilled craftsman. Hermit