Finished up deburring the 40 sized holes on the upper and lower flanges of the wing ribs today. After deburring all of the holes, each one was dimpled. I couldn’t use the DRDT-2 for the dimpling of the ribs so I used the hand squeezer. I mounted it to the workbench so I could hold the rib with one hand and dimple with the other.

So for each of 28 ribs, I have now:

1. deburred the edges
2. fluted the flanges to straighten the rib
3. final drilled the holes in the flange (around 45 per rib)
4. deburred the hole
5. dimpled the hole