device fig6 details a method for determining the most efficient off set dimension 15 for the ski surface 28 see fig4 and 5 the first step in locating this off set dimension 15 fig5 is to draw center lines and arrive at a point of origin 19 shown on fig6 the next step is to draw a 0 500 radius 20 which represents the diameter for small cobs this radius intersects the vertical center line at small cob diameter point 21 a large cob diameter point 22 is then located along the vertical center line this large corn cob diameter point 22 is located by drawing a 0 875 inches radius from point 21 along the vertical center line the fourth point to be located in this procedure is the location of the knife pivot point 23 a distance having a radius 24 of 2 625 inches from point 22 is now located along the horizontal center line a sweet corn cob center is the distance from points 19 to 22 the fifth step in determining the off set radius 13 is done by drawing a 790 inches radius 25 from the small cob point 21 the 0 790 inches radius 25 has been determined to be the optimum for this procedure by past experimental usage and is in common use throughout the industry a final radius 27 of 2 640 inches drawn from experimental tests for optimum results is.