Raspberry Pi Camera Mount - ring magnet & M4x6mm

A mount for the IR raspberry pi camera, minus the IR LED's.
Simple to attach anywhere to a (ferrous) metal frame. I prefer the Z carriage on my i3, so the camera raises as the Z axis does. I target the top of the print, so it is always what is in centre frame.
Rotate fairly freely to desired angle.
Pulls away if anything snags it.
Simple and stupid. I have tried to find the ideal camera attachment for a long time, this is just my way of giving up and going for the simplest possible solution I can think of at this point in time.

Needs:

• 1x M4 button capped bolt, the black 'high tensile' ones (the shiny ones aren't very magnetically useful).
• 1x Neodymium magnet N50 10mm x 3mm & 3mm countersunk hole. Or several for additional holding force and offsetting the camera POV a bit.
  https://www.ebay.com.au/sch/sis.html?_nkw=Magnet+10+mm+X+3+mm+Countersunk+Hole%3A3mm+Rare+Earth+Neodymium+N50
• 4x M1.5 x5mm self tapping screws... or whatever size usually screws a raspicam into a housing.

Herp Derp.

• Screw the M4 into the side of the housing, stick the magnet to something metal, stick the camera onto the magnet via the rounded bolt head, adjust angle.
• I have a square of innertube rubber between the printer frame and the magnet, to give it more friction and prevent it from sliding around.