Mid-fuselage ribs and bottom skin deburring and dimpling

The outboard rear seat ribs weren't aligning with the skin holes, so I had to flute them, which was quite annoying when already attached (I even got a smaller fluting plier just for this):

Fluted outboard rear seat rib
I match-drilled them properly and removed the skin, then started deburring and dimpling all the ribs and bulkheads for

Deburred and dimpled ribs
All center section bulkhead holes and the holes with tabs on other bulkheads were machine-countersunk:

Machine-countersunk holes on aft center section bulkhead

Dimpled and machine-countersunk holes on rear spar bulkhead

Dimpled and machine-countersunk holes on fuselage bulkhead
Next I need to deburr and prime the skins so I can start riveting them on.

Time lapse:

Total mid-fuselage ribs and bottom skins rivets: 412
Total mid-fuselage ribs and bottom skins time: 75.0h

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