I made this discovery by accident and I'm not afraid to admit it!
After I got the wing installed I noticed that the push rod was rubbing on something. I thought it was the bulkhead at the TE so I cut a hole in it as described in the drawing. To my chargrin that wasn't it! It was rubbing the wings top sheeting. DOH! What to do?
I cut another hole in the bottom and through both bottom and top sheeting to relieve the push rod. (Don't you just love scratch building!?)
Its back together now and ready for sanding and silkspan. Whew!
Jerry