C13 contrast adjustment for fader caps

Please add some sort of adjustment to the fader caps , the darker outer rim of the faders is really playing havoc with my impairment , always i can see when looking at the fader is a blurred edge like double vision and im sure i will not be the only one .


Does it help to see what they are trying to copy:


Might help to imagine those but, as flat objects on the C13 mixer they do not represent the dip in the middle and slope at the ends very well.