I bought a mix of Eufy S220 and C210 cameras this summer. The built-in mount requires you to tighten it a lot to keep the camera in place, which I am not pleased with. So I designed my own to fit a generic Chinese CCTV mount. I plan to use external solar panels so I ended up making the whole enclosure. There is also a hole on both sides for a 2mm stainless steel wire to secure your camera.

You will also need these:
6x M3 brass hot insert. I use OD 4.2mm, length 5mm ones.
6x M3 8mm-long hex socket screw

Insert and glue 2x "mount screw plug" from the inside of the enclosure. Brass inserts are to be put in from the inside too. In this way when you tighten the mounting screws from the bottom/outside, they won't pull the brass inserts out.

Anycubic

Kossel Linear Plus

No

No