Turn the partly sheeted wing right-side up and stick it back onto the plans. This gives you a straight wing in the middle and the proper amount of washout at the wingtips. Sheet the top of the wing while it is still on the building board. You can use simpler, conventional hinging if you prefer. Here, you can see the wing-attachment blind nuts and mounting plate.
Dowels secure the front of the wing to the forward fuselage bulkhead.
This setup works fine but is fussy to do because of space limitations. I had to thin the bottom of the top wing sheeting to clear the neoprene tube. A simpler way is to use a standard control horn mounted externally. Because the surfaces are curved in all directions, I made the tail surfaces using sheet-core construction and built them flat over the plan. The ribs are cut in halves lengthwise so the top half of each rib can be glued to the top of the core sheet.