I recently bought and watched a bunch of the AP videos on here and I'm LOVING the results so far. Perhaps I'm looking too much into this, but where exactly should the inside edge of my index finger be? I've been putting the inside edge of my index finger directly in the middle of the cup. I've seen some sources say put the edge of your index finger on the outside edge of the cup, but I don't think that's correct.
Also, on shorter putts when you use your pinky finger, do you still place the edge of your finger on the center cup line?