Originally Posted by
kwiksi
You might have stripped where the grub screw goes in. Replace the plastic ball cup or put the tiniest bit of ca on the grub screw. I myself nor have I seen anyone at the track. Have had one come off. I think it's safe to say it not the design.
https://www.hpiracing.com/en/part/112725
To add to this, get the 3x5mm grub screws for inside the sway bar ball cups. The longer grub screws prevent stripping out the plastic ball cups and help to ensure the grub screw doesn't back off the swaybar.