I prefer rubberband mounted wings over bolt-on for the simple fact that I have a problem drilling straight and level into leading edges and such, so I always just go the easy method of rubberband. And it's always easier to adjust the angle of the wing after it is mounted on, as with the bolt-on method if the wing is not angled proper while you are drilling it is very hard to correct a misaligned wing after that (at least to me it is [:'(]). So for all my airplanes I will choose the rubber-band mount method, even when the option is not offered (I just modify the plane to a rubberband mount).