Sorry about no pictures, digital camera is out on loan. It is a Great Planes tank. I enlarged the opening mostly to the left looking at it from behind. The tank sticks out approx 3/4 of an inch past the former with the wing slot in it and the top of the tank "wrapped in foam" rests on the bottom of this former. The wing tab slide in the slot just fine and the wing itself pushes the tank down a little and holds it in position. It is just foam being compressed so all works out fine. I have around 50 flights on mine now and no problems with it.