The wing panels are ready to be joined now.

This design calls for the left wing panel to be completely built first, and the joiner glued in place prior to joining the two panels.
Another set of plywood ribs meet in the center joint, and really is nice see.

The right wing is then built, sheeted, and epoxied to the half with the joiner attached.

A nice 1/4 balsa wingtip is added to each side to clean things up.

This photo is of the inboard right wing panel before joining.