From my one golf lesson, I was told that at impact , your hands should look to be not only left of your left shoe from one's vantage point, but also at or behind your left heel line. That is the aiming point. That hand location at first appears ridiculously too far forward, but on video, the shaft isn't leaning forward all that much. What I originally thought was a forward leaning shaft at impact fix was in fact vertical or leaning backwards. Or as the instructor told me, not even close to leaning forward.