Hi Mike , Thanks for the comprehensive reply, here is the model when imported in dxf format :- http://www.jonsmedia.com/stuff/image1.png And here is the 3ds model :- http://www.jonsmedia.com/stuff/image2.png And here is a bevelled cube imported and with a brushed gold material applied, god knows how to get rid of the green. Oh by the way, here is the original piston model :- http://www.jonsmedia.com/stuff/image3.jpg Thanks Jon www.jonsmedia.com

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