Yes, finally I have finished drilling one set of flap . Gotta deburr , corrosion proof plus rivet it later. One done, one to go.

Last but not least, the trailing edge was drilled with its associated wedge-size spar cap sandwiched in between.

Note the limited clecoes in place though the rear spar rivet holes have been fully drilled.

The upper rear spar was being drilled finally.

Driling the nose ribs with #30 bit except for the far outboard and inboard end due to accessibility to hand riveting at a later stage.

Done.

Now drilling the upper main rib from fore to aft starting from the front spar.

Thumb up for another good job.

Confirm trice.

Confirm twice.

Confirm once.

Drilling on the upper front spar began after checking alignment w/ my digital leveler.

Now, the flap was flipped right side up and bounded tightly with few nylon straps.

Taking time to take a photo after hard work in drilling. Note, i have transfered all clecoes from main ribs to nose ribbs due limitted no. of clecoes i have.

Followed by lower the nose ribs.

Main ribs being drilled..

Mission completed.

Now the rear spar ...

Front spar rivet holes fully drilled. Note the flap was upside down at this point of time.

Oh yes, the reason i have abandoned my wing project for awhile was due to problem with true alignment. Here, i drilled the skin to the forward flap spar.

With bolt spacers in place using An3 bolts, washers and castle nuts.

After a laborious sawing...

Making the required bolt spacers (1/2" and 5/8" thick) for the flap track guide arm aand deployment arm.

Checking that the flap was true and plumb before drilling . Here, the skin has been put in place.

All main and nose ribs clecoed in position onto the flap front and rear spar.