Step 10: Check the wheel
Before hanging your cookware, check and see if the wheel is 1) properly fixed in the ceiling, and 2) not leaning or crooked. The first time I attempted this, as you can see from the photo, my pot rack was very crooked because I didn't drill a straight hole in the ceiling. As I learned the hard way, it is difficult to tell if the "hanging part" of your creation is crooked until the wheel is actually on!
If your wheel is straight, congratulations! Move to the next step.
If you're looking crooked, disassemble the rack by unscrewing the carriage bolt from the coupling nut, then unscrewing the hanger bolt from the ceiling. Start at step 3 by drilling a new (hopefully straighter) hole, then repeat steps 8 and 9.