Hi, For anyone interested in little playful stuff, I wrote a little program that generates GCode for nested screws. https://github.com/hzeller/gcode-multi-shell-extrude Have fun. H. -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://www.noisebridge.net/pipermail/fab/attachments/20140730/c33a70a8/attachment-0002.html>