Since the leading edge will soon be clecoed back onto the wing and the skin is dimpled, the holes in the spar need to be countersunk. I also spent a few minutes deburring the #8 holes in the tank skin. Then I deburred the holes in the z-brackets.
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In the above shot, I'm countersinking the rivet holes in the main spar. Once you get the depth set correctly on the cage, they go quickly.
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A close-up shot of the countersinking. Nice! Every one exactly the same. I love these tools.
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