Ball of Death: or How I Learned to Stop Worrying and Love Apple Pro Speakers

Step 9 Self-centering

NOT PICTURED BUT IMPORTANT: inside the metal collar is this little rubber gasket. Those Apple guys think of everything. It looks like it's used to alleviate pressure on the speaker wire.

Here's, I think, my favorite part: when you screw the metal collar back on (remember to use all 3 arms), the motor self-centers