I tried a split snaffle on her to start and she didn't respond to it at all. To the point she wasn't reining or listening. With the curb she is responding very well, so I think I will stick with it for now. I don't know what you mean about the curb chain though? I thought the old hackamore we had was a mechanical one, but googling it, it doesn't look anything like it. it had a padded nose peice with a shank going down that the reins connected to.
Here is a pic of it.
Many people have sighed for the 'good old days' and regretted the 'passing of the horse,' but today, when only those who like horses own them, it is a far better time for horses. ~C.W. Anderson