Originally Posted by Creampuff
as well as bring his head down so he travels less hallow.
This is a false statement. Bringing a horse's head down by using a bit intended to do it, is always going to make the horse hollow. Suppleness, roundness, in all disciplines, is ALWAYS coming from the back and the hindquarters. It doesn't matter if your discipline is dressage, WP, endurance, anything. Getting a horse less "hollow" never, ever starts with their face and mouth.