Octagons Above- a 1 minute video showing how to carve an octagon Below- Step by step instructionPlace a 12″ square piece of ice on a plank of FoamMultiply 12″ x .29 & you get 3.48″ (use 12″ because that is the width of the square)Set your layout jig for 3.5″ & scribe the 4 lines.Using a chainsaw, cut right on the outside edge of the linesUsing a pistol grip sander, smooth all of the flat surfacesThe finished OctagonThis bar was made with- Cylinders, Octagons & Rectangles