Now that I'm past the solid rivets it's onto the wing doubler. This seemed fairly easy, except that back drilling the doubler was going to be a challenge, so I removed the 2 rear ribs. I've seen pictures of others doing this.

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backside wing doubler

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finished doubler

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Next step was to reinstall the nose ribs. First I replaced the top skin and clecoed and back drilled through the new extrusion. I used some scrap aluminum for a template. On the next wing I will make one for the bottom also and can do the nose ribs without the nose skin.

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Set the nose skin on top and clecoed into the extrusion and template, back drilled throught the nose skin.

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Completed template. I can reuse on the next wing by moving over the hole pattern 10mm or so.

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Nose rib test install, need to attach the nose skin to hold the ribs and attach the new angles. Next wing will have a bottom template.

So, I walk back out to the workshop to attach the nose skin and finish the nose rib install and I see this, hmmm, looks like a template to me.

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I spent about 5 minutes making the bottom template. Well worth the effort. Nose Rib installation won't be a problem.

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Well before AMD started adding L-angles to the wings, I added some stiffeners in the soft spots and to maintain the airfoil shape. I did call ZAC about this previous modification to make sure it wouldn't cause any issues. On the 2 outside bays I added false bottom rear ribs. I was approved on the condition I add the span wise angles. That's okie dokie with me. Now I'm going to add some false bottom ribs to the other bays. That's why they call this Experimental :-)

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inboard l angles

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Upgrading the Center Spar | Installing the Center Spar | Installing Part 2

Links to the other useful blogs.
Bottom Doubler Template | Front Upright Template | Bucking Station
Adventures in Riveting | Solid Rivet removal - Navy Method