Yeah, I tried the Myler bit a few years ago, but it was when I still had no clue about riding and was not riding on contact. I sold mine, but maybe that's worth another look. The only thing I didn't like about the one I had was, if you pulled on both sides of that bit at the same time, the roller piece in the middle could potentially pinch.
Puck's not a mouth gaper or head tosser. We just need him to know that no harm will come by taking contact with the bit. A good part of it is my fault by being too noisy with my hands. Luckily until recently, I rode with my reins too long, so no visible harm was done. This one's more psychological for him to start trusting my hands.
You just have to see your distance...you don't have to like it.