On Wed, 23 Oct 2019 05:58:40 -0400, "Steve W."
wrote:

Anyone got a site or place where there are plans or drawings that show
something like a sine bar machine or other style that wouldn't be that
hard to build?

Am thinking of building a flintlock or percussion rifle all from scratch.

See http://orro.net/2011/02/rifling-machine/ for some ideas.
--
cheers,

John B.