I started the day by cutting a piece of channel to make W21-13 &-14 (2 each). These are used to make a Rib #9 Assembly. Then I turned to deburring the aft wing ribs... 24 ribs, 72 lighteing holes and 49 1/4" holes. Then the flange edges had to be buffed clean. Whew! 16 finished and 10 done except for buffing the flange edges with the scotch brite wheel.
