This paper has some more details of how the sample collection system works. I agree that cold-welding is likely. https://link.springer.com/article/10.1007/s11

This paper has some more details of how the sample collection system works. I agree that cold-welding is likely. https://link.springer.com/article/10.1007/s11214-018-0521-6 https://link.springer.com/article/10.1007/s11214-018-0521-6