A lot of people don't realize how distructive a simple snaffle bit can be and judging by that video neither does this yahoo. I think if this guy did this to my horse he would have found him self with a fat lip, on his back and kicking in the sand. It's that you pop my horse in the mouth I pop you in the mouth sort of thing. I've never heard of him but I think I'll never look into him again past this thread.
That being said i have no problem with a cathedral or spade in the hands of someone knows the deal and if the horse has been prepared.
The spade bit is NOT , NOT , NOT a leverage bit. i repeat NOT a leverage bit. It is a SIGNAL bit and should be used as only a signal bit.
What do i mean as a signal bit? here is a little run down of how they work , as I understand it.( I am NO expert) Just a student on the path to enlightenment, and along way from it.
The spade has a spoon, roller or cricket, braces, and a cannon bar( or the cross peice. The horse learns to pick this whole thing up and hold the bit with its tongue. The cricket or roller is designed for the horse to roll with his tongue which inturn keeps the horse from bracing on the bit and soft in the jaw and inturn inthe poll. It's physically impossible to be clinched in those places when they are rolling there tongue around on the cricket. The spoon is balance to hold a neutral position in the mouth. If the horse raises his head and "roots" his nose out the spoon will raise off the tongue and rest on the roof off the mouth. if the horse drops past vertical the spoon will rest on the tongue. This allows the horse to find that "sweet" spot of release to carry his head.( Now this sweet spot should have already been worked on in the hackamore stage.) Now the signal comes in as your riding the horse is holding the bit and and you get ready to ask for something yo lift the spoon to tell the horse" hey I'm going to ask you to do something". Then your body takes over with your legs and seat. the two rein will be used to get to this point before the horse is ever even thought to be straight up in the bridle. Which is to say the horse will carry the bit without ever having the bit used for a long time before the bridle reins are ever used.
The second you actually pull on the reins with a spade you are no longer using a signal bit, your using a leverage bit. As I said before, a spade is NOT, NOT, NOT a leverage bit.
These describe far better than i ever could about the spade.
A catherdral bit is NOT a spade. Even though some tack adds will call it that. The work of off the bars of the mouth and soft pallate of the horse where as the spade is working on the tongue and soft pallate.