I am constantly amazed at how the small things make such a huge difference in training. Here’s an example of one of those such things.
If you are struggling to get a soft flowing travers (Haunches-In) turn your inside hand over slightly (like turning a key).
This MUST be very subtle so as not to draw the horse to the inside or bend the horse’s neck.
OMG! what a difference it makes to the ability to control the angle of the haunches-in.
Other essential elements to check for are forwardness and straightness of your upper body, i.e. ensuring that you are not crooked with your upper body. But try the hand thing. It’s a gem!