I hope you have reconsidered taking the white line off the putting surface or at least give up the option of turning it off or on. No one seems to have a positive opinion about this and I can't see why you are being so stubborn for keeping it. If we have to keep it , please post the instructions for using it because it doesn't seem to aid in determining the break or the line. If anything, it obstructs line of sight. Just my thoughts and many others, I see.
Cheers