While putting the screws and lock nuts into the arms, I stumbled on an approach that seems a lot less tedious than any that @bar describes in his video. Although YMMV, here it is:
First four arms:
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Drop a lock nut into one of the hex-shaped depressions, making sure that the round part (with the black plastic insert) is “up” (i.e., showing).
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Using some appropriate implement (e.g., ballpoint pen, chopstick), press the nut into the depression until you feel it “seat” (i.e., stop moving).
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Repeat for all six depressions on each of the first four arms.
Remaining arms:
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Drop a bolt shaft into one of the hex-shaped depressions.
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Using the nifty (supplied) Torx screwdriver, press the bolt into the depression until you feel it “seat” (i.e., stop moving). Examine the protruding part of the bolt to see if it seems a bit “short”. If so, push a little harder.
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Repeat for all six depressions on each arm.
Notes:
It may seem tempting to press the bottom of the screwdriver with the palm of your hand. I don’t recommend this, as I’ve developed issues from doing this sort of thing in the past. Here’s a comment from the Goog:
Excessive pressure on the palm of your hand, especially from repetitive or forceful actions like pounding on a screwdriver handle, can indeed lead to various problems, including pain, inflammation, and potentially more serious issues. …
The approach I used, FWIW, was to:
- Insert the tip of the screwdriver into the bolt head.
- Grab the outside of the “arm” with both hands.
- Pull the “arm” forcefully toward my chest.