hunterundersaddle:
I definitely want to get all of that metal out of his mouth
Anyway, what bits do you use? What do you think about the severity of a corkscrew D ring? Love to hear what you think :)
I use a pelham a lot, I like the way my horses go in them. In the 50's and 60's when I was learning, they were used frequently and most young riders learned how to use them effectively. I like the fact that I can use the snaffle very softly, but still have the curb for when I need a bit more authority (extra brakes, for instance). The curb can and should be used softly too. I do insist on only the type with a solid mouthpiece, though. If you use the curb rein of a pelham with a jointed mouthpiece, and the reins are the tiniest bit uneven, you subject your horse to a nutcracker action vastly magnified by the leverage of the shank. We're all subject to human error.
What do you mean when you say "get all of that metal out of his mouth"? I've never seen a pelham that has any more metal in the mouthpiece than a snaffle has, so I don't understand.
As far as the severity of a corkscrew D ring (that's what's often called a slow twist, right), I've never liked them. No matter how softly you use your hands the edge of the twists are going to bite into the horse's bars. They're designed to! A pelham with a solid mouthpiece is going to be much less severe.
You might try riding him in the pelham and tying up the curb rein for a little while. That will be like riding him in a snaffle and should give you a feel for how he's going to go in it, while preserving your option to pick up the curb again if you need it. You may be surprised at how he goes, and gratefull to have the curb rein available.
Good luck, and let us know how it goes.
MaryM43