Groundwork lunging bitless to get the horse to work the topline more and engage the hindquarters

Groundwork to build the too line and engage the hindquarters. I'm working on building the top line on this horse and getting him to get his hindquarters more under him, so its a slow process, but I'm looking to use a Passoa training system, but until that arrives I want to make sure he will accept a hindquarters rope and he will give to pressure on the inside rein. This is a temporary test set up just to see how he will do. It does not add pressure to the hindquarters, however I can see a difference in the way he is traveling and he is lifting his back. This is only a start, so much more to go.