You’ve built your 4 axis CNC Foam Cutter and now you need some software to generate g-code for that foam wing. If you can afford it then buying software may be the way to go, but expect to pay up to £300/$400 for Mach3/4 and DevFoam Wing etc. I just posted a video and updated by eBook on how you can do this without spending any money on software. Check my website http://www.rckeith.co.uk/foam-wing-free-cnc-software/ where you can sign up for the eBook and here's the video thats goes with it. Its about 30 mins long and show how to install and configure LinuxCNC as a 4 axis foam cutter and then use a free airfoil generator to make the wing , thanks to David the Swarfer.