Originally Posted by kevinshorses
I always use a curb chain on my snaffle so that it can't pull all the way through his mouth. It's probably unnecessary for a full cheek but it won't hurt anything. You really can't cause a horse to flip over. A horse does it by choice not by accident. A rider can't accidently cause a horse to go over if it doesn't want to.
I use a curb strap on my D ring snaffle. It doesn't hurt the horse in anyway, I only use mine because it keeps the rings from moving. I'm with you on this one. Unless the strap is extremely tight it shouldn't have any effect on the harshness of the bit.