I don’t smoke anything the most powerful drug I take regularly is Ibuprophin.
We have clearly reached impasse, here, on the issue of gait training. I’ve said all that needs to be said.
On the original question, the horse needs to learn to yeild to the bit. Adding bit authority can make the job go faster, but it can also lead to reliance on the extra “iron authority.” That latter result is problematical.
So teach the horse to yield and you will set in on the road to becoming a good equine citizen.
G.