About this 3D model

This is a frame for a quadrocopter made out of 2mm birch plywood. It is designed for manufacturing using a 3-axis CNC mill or an Laser-Cutter. The frame was designed in XMAS 2010 and has successfully tested by over 20 builders during the last year. A full description of the project can be found here: http://www.flugwiese.de/index.php/projekte/41-schaummodelle/112-murkelcopter (unfortuneately all in German, but a lot more pictures and links to english pages) Why is it called the "Murkelcopter" ? Well, the name was given to it by my daughter when she saw the first prototype of the frame