Match drill holes to skin and rear spar in remanufactured brackets in LH and RH wing ribs 4, 6, 8 and 9

These rib bottom skin attachment brackets were remanufactured by myself nearly a year ago due to hole tolerance issues and the perceived inferior result of hammering a ledge (for rear spar flange clearance) in an already-folded bracket. Match drilling the the holes to the skin and rear spar had to wait however until the wing skins and internal structure were accurately clecoed or riveted into their final positions. As usual with match drilling I start with a 1/16" pilot hole, then enlarge with a #40 reamers, then finishing (when matching #30 skin holes) or enlarging further with a #30 reamer, then finishing (when matching #20 spar holes) with a4.1mm reamer.

Both LH and RH wing ribs 4, 6, 8, and 9 bottom skin matching brackets were match drilled.