Iker Zubi has written up instructions for building a fixed-wing drone using a Zero and the PXFmini add-on board. There’s a bill-of-materials and pictures of the build at each stage. He reckons the whole thing comes to about $150 (although personally I would add on a Pi camera to get video footage and photographs). Still, that’s not bad for a drone and it looks like a lot of fun! Take a look at the project page here.