The undersized holes on VS-1207 are the ones on the first flanges
on the left … both upper and lower.
Thus far, all the parts from Van’s have fit together perfectly (prior experience with Van’s parts has shown if it doesn’t fit, the assembly is being putting together incorrectly) … so when I saw the hole in the skin was aligned with the hole in the rib but I couldn’t get the Cleco into the hole, I knew something was wrong. Then I had a flashback and remembered reading about this minor issue. Drilled the two holes out with a #30 drill bit and now all is well.