I purchased a 2nd hand wing kit. Some work had been done, but everything was still open enough that I could inspect every fastener / part. Both spars were complete, and the left wing skeleton was basically complete, with leading edge skin riveted on. The following pictures were taken after many hours of cleaning. The kit had spent some time in a hangar collecting dust. Also see attached the 'just constructed' wing jig, It only took about 2 hours to build and level.