US conduit post for graver sharpener

Had trouble making a suitable base for the Graver Sharpener, so I grabbed some easy-to-find electrical hardware. The remix is a 17.9mm collar for American EMT electrical conduit. Use a compression fitting between the conduit and the junction box for a truer 90 degree angle. Avoid set screw connectors, since they squish the tubing to one side by as much as 5 degrees, making your sharpening off by that much, also. Use Scotchbrite or fine steel wool on the conduit to smooth the surface imperfection