Cool video here from a lesson in which the student struggled to get the club to hinge correctly on the takeaway and as a result they struggled with a long unstructured top of the back swing with little structure. So, should you struggle with your takeaway or a crazy long back swing that gets the club out of position this could help you. I love using resistance bands to force you to make a change.
This here is another drill you can do with the Pivot Pack!