The .60size U can Do 3D does have a one peice wing already joined as a complete wing . The bottom of mine is Red and White checks. It is very light so far, mine is all assembeled except for radio. I am waiting for digital servos to come in. I have seen one .60size U-Cando-3D fly and that's why I went out and purchased mine. I also have seen the .40 size fly and have heard nothing but good reports about it. For my taste and preference .60 size will be better for 3D flight. Set up right weight should not be an issue. Just be ware of the thrust right and down. Great Planes has had issues here. I wrote to them on several occasions and was given conflicting answers. So check into it, they may get there act together in the future. Also beware of wheel pant mounting, when I mounted mine (exactly as stated in instructions) they are very low to the ground. Grass feilds may be a problem, but not sure have not flown it yet. If you look at they way they are mounted it will be clear to see what I mean. Keep in mind when building.