I have been making antwieght fighting robots for the past 5 years with some sucess. I used to machine parts and drill and tap polycarbonate to construct my robots, which took a very long time as wasn't as accurate as i would have liked. My latest designs have had 3d printed chassis made from WS&F. I am very happy with shapeways, although the parts aren't perfect with a bit of filing and drilling the parts are far more complicated than i could produce normally. Below are my latest robots. This robot is called Anticide weighing 150g This robot won the Antweight World Series 28, with its 175psi pneumatic flipper. http://www.youtube.com/watch?v=RlQG4uHWKx0&feature=chann el This is the latest version of Kwijebo a 225g walking robot with a 106g disc which spins up to 12000 rpm. The cams for the legs have been made as one piece with 0.25mm clearance and run up to 3700 rpm. I also have a video of the legs being tested http://www.youtube.com/watch?v=vdd_q5qJWgM&feature=chann el Lastly is the weapon test. http://www.youtube.com/watch?v=Qj8GRD60YOg&feature=chann el_page Maybe the next ones will be in colour.