Width of servos is greater than the width of the opening in the wood frame of the wing. Length appears 1 or 2/1000 small, but I'm not too worried about that since there is only sheeting at the front and rear of the opening. To either side of the opening, there appears to be a wing rib bordering the hole. That's why I'm asking-don't want to weaken the ribs by doing something wrong! According to the Hitec website, the servos measure 0.80 inch wide-that is the direction I'm having problems with. Hope that makes sense.