Go to emachineshop.com and download their free software. You can use it free and draw up all the stuff you need, using it to print full scale drawing and test shapes for custom pieces. When you want to save a file to take it to a CNC shop to have it Lasercut, "Export" the file to a jump drive. It'll be saved as a .DXF file format that any computer driven plasma or laser or water jet can use. The operator just needs to remove the 3 dimensional drawings and save the 2D scale drawing. Easy peazy, I do it all the time and saves me a tonne of money on set up and drawing time. Shhh don't tell no one though 8)