Now that I finally got my machine up and running using Linux EMC2 I'm in cnc router happy land. Can't wait to engrave my own AR15 upper. This is a skull/crossbones reticle image engraved on an old 1940s era blank record acetate. I used Inkscape to convert the image into paths then used a gcode plugin someone made for Inkscape. Main reason to for building the cnc router was to do circuit boards. Image isn't perfect because I went with the defaults on the Trace to Bitmap function but still this is FUN! Had to share!