The horse I have been riding usually goes in a slow twist d-ring. He throws his head a lot and can get really quick. He does know what to do and I make sure I have very soft hands, which he likes. I was considering trying a different bit with him, but wanted to know your opinion.
I originally thought a d-ring french link, but someone was telling me about a Copper Roller d-ring. Just wanted to know others' opinions. I do not like full-cheek bits, but if you really think that should be used, I might try it.