Its amazing how quickly the uninformed turn these threads into an aurguement thats adds absulutly nothing to the comminuty. Thats the reason most RC fliers dont visit these sites and those that do refrain from posting.
The reason there was three holes is that I have rotated the tube over the years in order to make new holes at the ends of the tubes (where the wings are screwed to the tube).
He says in the first post that the wings were screwed to the tube at each end, there for the center screws were not needed. If one of the wing screws came out the plane would crash any way. I use screws in the wings and none in the center.
Joe