Fuselage center section #28 - Seat rib area assembly

 More part prep to the forward seat rib area parts.

Cuttin these parts apart...

Removing the flashing and deburring.

Cleaning up the extreme amount of shear marks on these things.

Enlarging some holes...

Have to do some countersinking of this bulkhead.  It gets thin so you need to trap the pilot of the cutter so it does not elongate the hole.  I used a block of oak hardwood.

I then drilled the holes and cleco'ed the board to the bulkhead.

Then countersunk the holes without any issue!

All done!