Originally Posted by DavidQ

My overly technical, and artificially precise reading of step 7 says that the lug would be between the first and second fin that you glue on. Not the second and third, or third and first. If it's between the third and fourth fin, then you might be cloning the wrong kit. The first fin to attach is exactly 120 degrees from the motor clip, taking the thickness of the clip and the fin into account. Be sure to read between the lines in step 7 to determine whether the fins should have been assembled in a clockwise or counter-clockwise (or anti-clockwise to our UK friends) direction. Be sure to provide photographic evidence using a Brownie camera, or some other instamatic that was available in the day.

Also, although fin alignment guides help immensely, they didn't exist in the early years. So, I would guess that the build log should include the college-ruled paper with a hand-drawn circle and three fins sticking out which was used to visually align the fins.