Was frustrated that I didn't have the knobs and screws needed to finish the Project off as shown in the original post, so I edited the Mic Stand bracket to fit a 4MM-.7 x 25MM hex head screw from Home deport, and matching Nut.
Then took the a SCAD (sorry can't find who to credit, and made knobs for the above screw, and then for a 1/4" thread x 3/4" Hex head screw to fit the H4N.
I felt that the mount piece as originally designed, was a little thin, and when mounted to the Zoom, would warp a bit. So I thickened it up a bit, and you will find that here as well.
Works pretty well.
I haven't printed the thicker piece yet, but the other print OK.