Yeah, an Inspection ring....After covering both the wing and aileron, I used my soldering iron and cut out the center of the inspection ring to put the bolt and safety wired it in place....The outside bolt went in from the outside so no biggie there... I did that AFTER all covering and painting,,,,
I put the aileron in place before paint just to be sure there wasn't a warp after shrinking...just didn't put the hinge bolts in permanently till after painting....