She is riding/showing a Haflinger gelding in open huntseat classes this summer and is having difficulty getting a headset from him. She is riding him in a Kimberwicke (or Kimblewick or whatever you want to refer to it as) with a jointed mouthpiece and are having issues at all 3 gaits. I don't think he's bracing or flinging his head about, but as a Haflinger who is trained to drive, he's rather heavy on her hands and just hasn't gotten the concept of carrying himself. Therefore, he's nosed out and isn't framed.
I know this is a dressage heavy forum, but she would like the input of those who have experiences in huntseat/HUS.
Also, she mostly does walk/trot work with him, not a lot of cantering.
If there are any questions, I can ask her and find out the answers. I can probably get a video, but it won't be a recent one.