No matter how you build it, it will be a great flyer. I've built with both flaps and ailerons and full length ailerons. The flaps are kind of like adding racing stripes to a Volkswagon Beetle, look nice but don't do much as the plane flys so slow anyway at low throttle. The one place flaps help though, if they can be adjusted over the entire range, is for inverted flight. You can set them so that the plane will fly "hands off" both inverted and rightside up without changing elevator trim.