After work, I finished up on the W-423 joint plate (leading edge side) and drilled the inboard leading edge rib, the joint plate, and the skin all to size #40.  Working on this left wing joint plate was so much easier than I remember it being on the right wing.  I set this puppy in there, took numerous measurements, drilled, checked new hole on rib, and drilled again.  Wham, bam, thank-you maam...  The joint plate was drilled and clecoed in place in about 15 minutes.

Just an view of the inboard side of the leading edge.  I think that the joint plate and inboard rib turned out better on this second wing than on the first.  It definitely went faster....  WooHoo!!!

Now, the first of the dreaded tank fabrication tasks.  The "Z-BRACKETS".  I reviewed my log entries I made for the right wing so I remember what I did and what I WISHED I DID.  The one thing I did differently is that when I measured the center of the z-bracket, I measured from the inboard side of the bracket in order to account for the thickness of the bracket web.

Right Wing Log Entry For Fabricating Z-Brackets

My drill press has a tendency to "wander" and results in inconsistent location of the holes drilled in aluminum.  Yeah, this cheap drill press is okay for wood working, but not for drilling plane parts.  In order to get a more consistent drilling location, I clamped blocks to the drill press table.  I wished I had a 'X - Y' adjustable clamp (next time I go to Harbor Freight).  To further enhance the accuracy of the drill press, I used a spring loaded center punch to start the hole.

Yeah, I know, this is some basic stuff.  For the life of me, I don't remember doing this on the first wing and I couldn't find any mention of it in my log entries for the other wing.  Anyway.... the holes on the z-brackets this time around came out great.

After drilling the one #12 hole on one side of the z-bracket flange, I used some scrap bolts and nuts I used on the right wing to secure the z-brackets to the main spar.