I'm building a Kingcat, and the holes for the left boom are drilled in the wrong place. I had to enlarge the holes, fixture it up and fill the gaps around the phenolic tubes to get the boom into the proper orientation. These are made by composite arf so the quality control is most likely out of Bob's control. Also had the same problems on the holes for the stabs on that same boom. Most likely they use a fixture to create both sets of holes.

Dan