It was the wiring seemed slightly counter intuitive, the black (0V i though) is now connected to c.2, with the red into +vcc and the brown into the 0v rail
i tried every other combination after that and the current one is the only working one.
the voltage does seem off....and its strange, the voltage goes from 3.55--to--1.6--back to 3.55, over a range of 8cm, to 20cm, to 80cm, really very strange...
not entirly sure how to tackle getting that sorted out....however, i am happy it is "working" haha,
"similar triangles" ? so calibrating it so say a +0.1 volt jump = 1cm so it is reporting an accurate range? anybody got any help on that, because i genuinly dont have a clue :P