The biggest challenge in the UC system: the cable for the ServoCAT. It can derail and in the dark is difficult to put back on.
If you're running the ServoCAT to drive to and track objects, it almost never derails.
Only when you are not using the ServoCAT and there is too much slack (adjustable via the engagement lever), will it derail. This does not affect your Push-To tracking (and it certainly doesn't affect non-guided operations)).
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