TECHNIQUE

After the front dowels are in place, center the wing, and measure from tip TE to rudder post. Both sides need top be the same. this squares the wing with the body. MARK IT!!! This is so you don't have to re-do the procedure if you move the wing during the next step.

Next step: Drill a small (3/32 or so) pilot hole thru the wing and ply plate in the fuse. Both sides. Now leave the drill in place in one of the holes, and re-measure the wing to body as above. Both the same. Good. If not, move the wing and re-drill a hole. Re-measure, etc. When it is square, then drill the final holes to a #7 drill.

Then remove the wing, and proceed to tap the ply plate with a 1/4 x 20 drill.

On the wing, drill out the pilot holes with a 1/4 drill, then relieve them a bit with an Xacto blade. Trust me, the holes are never perfect.

After tapping the ply plate, soak the threads with thin CA, let cure, and re-tap it. this makes the threads really strong. In fact, run the tap up and down a few times, leaning it back and forth. This will allow the plastic screws to engage without binding.