I bought some 7/16 X 6 inch long bolts and cut off the threads. Then I tapered the ends, and smoothed the shafts. These I'll use to poke into the wing holes to assist in final alignment when I bring the wing into the fuselage. I hope it works. I might have to sharpen these more. And I might want to reduce their diameter a bit more.
Also I'm showing a photo of one of the stick bolt on locations. I have different washers on left and right to make this fit with no gaps, but also no pinching. Too many washers and this binds up with friction.