Anyway, so I rode her in it for the first time today. She did very well but she seemed to be a little confused about direct reining (thank goodness she's awesome at neck reining now). I can understand why she was confused though, this type of bosal/hackamore (it's refered to by both names, not sure exactly what the "technical name" is...) puts pressure on the left side of her face when I pull the right rein to go right and the right side to go left.
I ended up getting off and flexing her neck both directions a few times to help her figure out what I want and she seemed to be getting it. She did really well with stopping and backing in it and we even jogged (!!!!!) on a loose rein (!!!!!!!!!!!!!!) with no issues.
Basically, how do I get her supple and nice (she's awesome at neck reining in it) direct reining in it? I think I may just be taking for granted the suppleness most horses I've ridden have becuase I have no idea how to create it... Just more circles and serpentines and stuff? Neck flexing?
Here's a picture of the noseband part (you attach the noseband where you'd attach the bit but it sits higher on the face):