As I stated before, I think I'm more a software man than a hardware guy, and I don't claim to be an expert on hardware, but I have one opinion which is
different of what I often see: I don't believe in any curb bits with a broken
mouthpiece. In my opinion, the only good reason for a curb bit with a broken
mouth piece is in a pair, when one horse prefers a broken snaffle, and you
want to have both bits look the same from the outside. But then use the
curb-bit with the broken mouthpiece ONLY on the plain ring setting, without any
curb-action. Because the moment you try to use curb action on broken mouthpieces,
when you take some contact with the reins, the bit folds together, making
the curb chain MUCH longer, and with that you lose the proper curb-action. Keep
in mind, a properly adjusted curb-chain should allow a rotation of the bit
up to about 45 degrees. Anything shorter is more severe, but anything longer
is also more severe, as it rotates the bit too much, pushes it up in the mouth
and adds poll pressure. So in my opinion curb-bits with broken mouthpieces
defeat the purpose of a curb-bit. So why do we see so many curb bits with
broken mouthpieces out there? I think because many don't properly understand the
different bits, and think, if a snaffle with a broken mouth piece is good,
and a curb bit is good, why don't we combine both, and it should be even better
(same as many of the cross-breedings we see out there) and forgetting that
combining both perhaps may not result in anything better, but may ruin the
good, but separate qualities of both (also same as with many cross-breedings).
Flame away
hardy