Dockable omnidirectional kinematic touch probe

Operation: https://youtu.be/cklbMCITKlg

Working principle: same as touch CNC probes. The probe is fully 6-DOF constrained by 6 points of contact (both electrical and mechanical) that are wired in series. The probe can't move or tilt in any direction without breaking at least one of contacts.

Further reading: https://en.wikipedia.org/wiki/Kinematic_coupling

Note that the magnets on the probe and the base must not touch one another, the probe should be resting only on the wires. The base accepts one or two magnets, for lesser or greater preload on the contacts.

BOM: 0.3..0.5 mm^2 (20 or 22 AWG) solid core wire, 2x or 3x 5mm diameter 1mm thick disk magnets (3x for stiffer attachment), m2 screw, length to taste. Some superglue (for magnets).

Wiring guide, assembly: TODO.

Note: the wires in the probe base should go between the top of the "canyon" and the furthermost(!) hole in the bottom of the "canyon". All of the points of contact should be electrically in series.

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