From: Greg Rudzinski
Date: 2014 Dec 19, 19:37 -0800
This square mini plotter made by map tool is intended for use on topo maps but I have drilled a few 1/16" holes in the grid and use it as a pocket cockpit plotting tool. Very pleased with it but reading glasses are needed to see the 1° markings. To drill the holes first make a pilot hole with a divider point. Then take a 1/16" drill bit between index finger and thumb to finger drill by twisting back and forth.