The bottom of this ballmount can rotate.
The bracket is attached with a screw to the bottom of the ballmount and requires rotation to unscrew.
The screw is so tight that, even with the ballmount rotation locked, it still just rotates the ballmount.
I can't clamp the sides of the ballmount bottom as it is too fragile.
Surely I am not the first person in the world to have this problem. Is there a trick to getting this loose?
I tried leaving it in the fridge, hoping it would shrink enough to come loose or something but no dice.
Thank you for your time, feel free to laugh at me.
Wrap the whole thing firmly with a towel, something thinner and long, so you get multiple wraps. Then put it in a vice, very gently - just tight enough to hold it. Or let a person hold it.
Then use an impact driver to get it loose. If you use a cordless driver, use quick, short bursts. Like 1/4 second at a time.
Double check whether it's a left- or right-hand screw.