Been trying to get a 90 degree angle for track but its incredably hard to achive this. Anyone getting these two points of reference? in addition is there any points of reference which would be recomend for dual sensors? unable to go front and back due to limited space =(.

Hi
Do you mean you have troubles to get a successful calibration?
I suggest you to use a less angle, say 70-75 degrees. That way it's easier to have the board visible to both sensors at the same time. Also, moving the board left and right (when you cannot move back and forth) will also help.
You can also try calibrating using a flashlight, which is less sensitive to the angle between sensors.