Another approach that Iuse is to trace the parts in CAD. You can the stretch to the exact sizes, Make as many copies of the part as you need and place all on a rectangle representing the wood you will be working with. I found out my old Epson Photo printer will print roll feed, so I have a roll of 24# ink jet paper that I print my parts on. From there, it you just attach the print to the sheet of wood by the methods above, I have to try the sprayment, and start cutting. As BMatthews said be sure to sand in one direction so you don't fuzzy the line. If you print with a very fine line width, you get near if not equal accuracy compared to a laser cut part.

I've attached two screen shots of parts laid out for cutting. The first is ribs for a Ruperts Dad that I built. Most printers will print on Legal size paper, so I showed both the standard, RED, and LegalGREEN size papers along with the BLACK 3x36 sheet size for roll feed. The second is a set of ribs for a glider, actually two setson 3x36 sheets.

Don