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Thanks for the great guide! I can't get it to work though.

I did everything as you described, I've used the same Trianglelab 3d Touch sensor. It self-tests successfully when the printer is turned on.
However when doing G28 and G29 the sensor trigger is not read by the printer, it just keeps going down and crashes in the bed.

I've also tried sending this command:
M280 P0 S60
and then triggering it with my finger, but the M119 command keeps showing z_probe as "open".

I'm desperately seeking some advice as I'm about to give up.