Ross May 19, 2017
You don’t use a club for this. The thumbs give you your shoulder line. If you move your front shoulder down, then up (correct for putting), you can see your path. This is the path the ball will roll if you have a square putter face. Now… if you move your shoulders around your spine*, you will change your path. This is why most right handed golfers miss left, because their front shoulder moves behind them on the downswing (changing the path) vs. pulling up with the front shoulder to not change the path.
* We do not turn our shoulders around the spine for putting or chipping. We do turn the shoulders around the spine for all other golf shots. This is for more control when we don’t need much power.