Cheap diving compass

This is a rubber-band case for quite decent, cheap (~$15) china diving compass ([link](https://www.aliexpress.com/item/32997803615.html))

For assembly you need four M3x10 screws.

**IMPORTANT: screws have to be made from A2 or A4 stainless steel (or another non-magnetic alloy that will not interrupt compass readings)**

As the bottom is slightly profiled to be worn on left hand, you need to mirror the parts to be used as a right hand model.