A tiny paint scraf on the knob which I have noticed while taking pictures and I did highlight it (red encircled) in one of the images attached to the listing. I really love to use the ballhead over so many years and took care of it utmost possible. I had an intention to use it for large lens (500mm) as it can carry immense load without fail as per the reviews online. I think, this ball head is very well engineered and is very popular in USA as I bought it there only based on reviews in nikonian forum.
I will try to add some of the rave reviews about the ball head which were appeared in online media for your reference and decision making process if you are interested to purchase.

If you have any questions please drop me a message and also, please check my other photography related items on sale if you are interested.

References
https://www.youtube.com/watch?v=aC0Ut7N-Tqw
https://www.nikonians.org/reviews/markins-m10-m20-ball-heads/p/all
https://www.squiver.com/blog/review-markins-q20-ballhead/

Thanks again!!