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Then we start deburring and riveting some of our Upgrade Package additions permanently into place, starting with the back of the wing, riveting the Top Rear Spar Angles and Doublers...
...as well as the Aileron Bellcrank Support Channel and L-angles:
We lay the top rear skin back into place and Steve measures the location of the Aileron Bellcrank Support Channel's top L-angles...
...and Roger drills through the top rear skin into the L-angles.
Now, we roll the skin back to debur our newly drilled holes.
After we had removed the wings from fuselage, we checked the spar attachment holes using gauge pins:
Despite its age, this demonstrator Zodiac XL is well within tolerance: Using various hole tolerance gauge pins we check the fit of the wing spar attachment holes. We checked all the spar attachment holes and were pleased with the results.