Brief Description: Drill top forward holes in top skin to #30. Part 2
Again, these holes are pre punched to the smaller #40. All 16 holes need to be drilled to the larger #30 hole. Notice in image 3, the 8 holes on the right are counter sunk deep enough to make the rivet flush where as the 8 holes on the left are counter sunk a bit deeper to except the dimples of 3 layers above it (gusset, bulkhead and skin).
