Jigs are really nice. They remove a lot of the possibility for error, but you can still screw a wing up even if you do use a jig, and your wing is only as accurate as the jig. Likewise, you can build a great wing without a jig. Personally, I'd use this method:[link=http://www.airfieldmodels.com/information_source/how_to/tools/magnetic_building_board/index.htm]Build With Magnets[/link].