I changed my bit because I was using a wonder bit, which is used for gaming to "lift" the horse around the corner. I changed to a full cheek snaffle because it is mostly like a snaffle, with a little more guidance. I am a beleiver in the curb chain as well. But me getting harsher is, I think, the change in the bit. She isnt used the pressure and what I am asking because it is queing her differently. This bit is less harsh then the other, which is my entire point, because I don't want her to have a mouth of steel. I want her to be soft and responsive. I see progress in her though, maybe I'll make my boyfriend video tape us one day.