The Minkowski takes a long time. not much to be done about it but consider a different approach. Look at my similar ones Eschers and Jigsaw. - http://www.thingiverse.com/thing:1034488 - http://www.thingiverse.com/thing:1200785 - http://www.thingiverse.com/thing:986432 they used the inkscape to openscad extension here: - http://www.thingiverse.com/thing:1065500 The last one - jigsaw - has been manually edited to make one side thinner so there is a draft angle for easier use. -- View this message in context: http://forum.openscad.org/Minkowski-Sum-and-Cookie-Cutter-tp20733p20748.html Sent from the OpenSCAD mailing list archive at Nabble.com.