That is a nice post SECGolf. Very much spot on....
Something else that might be useful is to make 3 practice swings before each shot, first totally exagerate the plane line towards the left and then to the right and then right down the correct plane line. When this becomes too easy - make the practice strokes only slightly left and slightly right - always to the same degree between the straight plane line....
This is actually going to be my final post here for a while as I have other priorities. For a long time I spent vast amounts of time trying to understand all about the mechanics...etc that I left out someone that needs me and I need. So need to get my priorities in order before I post on here.... wish you the best until I return...