Small calibration panel for holes 85 x 72 mm for small printers like OneUp Tantillius Huxley Printrbot Simple etc.

Update: Added an even smaller an simpler design that will allow you to check your slicer settings against a known diameter. 10, 10,5, 11, 11,5 an 12 mm holes. Once finished just stick some 10 mm drill into it an see how far your hole printing results differ from CAD files.

This is a overworked version of HydraRaptor´s version at: http://hydraraptor.blogspot.de/2011/02/polyholes.html . Thanks for that so far. I have reduced the dimensions by obmitting some holes and diameters. The polygons hav