My buddy that Ive got addicted to blackpowder artillery now has a lathe that will handle an 8 inch diameter, two foot long piece of steel. We've been there and built the mortars, now we are looking for scale cannon plans that would fit that lathe. Anybody got hints on where to look or have any? Particularly interested in 3 inch ordinance rifles, parrotts, or dahlgrens but all considered that would fit that lathe. Thanks!