Thanks Gold for the reference, but have asked him , and got ignored , he just doesn't want to share.
But I have a work in progress, it's not 100% but close. Its hard to explain but here we go.
look at where the hole is in relation to the vert.line on the grid move the marker on the opposite side of the line the same amount. Now go to front view, as soon as it shows the view notice where the moving dots start to move, the marker should be there, if not go back to reverse view and move it in the direction to get it there, back to front view and check it. If it is good try to miss the ding about 1/16 in the direction the dots are moving., In other words if dots are going from R to L miss ding on the R.
Now on long putts you may have to move the marker 1 or maybe 2-3 squares, but when you check it in the front view the marker will still be on the opp. side of the Vert.line and the same distance the hole is off. Also sometimes you have to move the marker in the middle of the hole and the vert,line , but you will know this when needed.