Up Drilling and Dimpling the Tip Ribs

Today I worked on the tip ribs. I had previously removed the leading edge skin. First, with the ribs attached, I up drilled the #40 holes to #33 on the top flange. Next I used my modified dimple dies in my squeezed to dimple the holes. Afterwards I started removing the ribs one at a time and up drilling the remaining holes on the bottom flange and dimpling them.