No, there is no predetermined distance since the Joint Inspector measures the surface via the angle and the arm length, although a minimum distance for operation purpose is advised to allow the arm to move along the surface.
Yes, a difference between the multiple arms of the Joint Inspector can identify a slanted or turned panels. Even torsional-deformed panels can be identified with the Joint Inspector.
No, the enormous weight of the grab means that the Joint Inspector will not be pushed away. Even when the measurement is paused and the device becomes stationary, the distance between the Joint Inspector and the measured surface does not change.
