On Axis-1st: first final on-axis, where we saw the strange signature around 7.2 mm gap
On Axis-2nd: second final on-axis, where we saw the strange signature around 21 mm gap
On Axis-3rd: third final on-axis, after fixing the encoder head position. Results were good and considered official
On Axis-4th: fourth final on-axis, after realigning the probe to check if we get similar results compared to On Axis-3rd.

For more information, see the Power Point in this folder