However, Punk, if you only introduce that bit when you are going to neck rein then not only does the horse have a new bit but a new cue trying to learn. Plus, an ideal neck rein can be done in anything. The bit doesn't make the move, your hands and legs do. Ideally a neck rein will be on a completely loose rein anyway. Every single reining trainer, cutting trainer, cowhorse trainer, etc is going to have that horse in a snaffle even while learning to neck rein. That's how I do it as well. My colt is just turning four and he has never been out of the snaffle except once, and he knows how to neck rein just fine.
If you do it right, there will be no bit action, and the cue will be so small that it will never even go an inch away from the saddle horn/pommel.
Pssh.I didn't pick up the wrong lead
It's called a counter canter...
...A very advanced maneuver.