I made some significant progress on the wing today. I was able to get the internal center structure and bottom sheeting completed.

Pics #1-2 I changed the single wing pin to double pins due to the documented tendency to break the fuse from excess force at the center pin location. I did this by making an additional doubler that is epoxied to the front wing joiner, but drilled to accept the rear of the wing pins. The Leading edge was drilled with sharpened brass tubing in my hand drill. Once the pins were epoxied in place, I added additional lite ply half-ribs between the leading edge and the doubler and also epoxied to the pins.

Pic #3 The rear center rib was laminated and installed per the original plan.

Pic #4 Trailing edge sheeting installed

Pics #5-6 When getting ready to install the leading edge sheeting, I realized that there was nothing to support the center joint with the change in wing pin location, so I installed the lower half of the original pin support rib to provide a structural gluing surface for the sheeting. Then I was able to start by gluing the front edge of the sheeting. I've had very good luck by doing the leading edge sheeting in two steps. First glue the sheeting to the leading edge and secure it with masking tape - just like edge gluing sheets for larger areas. Then once that has cured, the sheeting is glued over the ribs and clamped to the spar.

Pic #7 The last of the bottom sheeting installed and drying for the night.

Next step: cap strips, wing tips, and finish sanding...