I use a french link on Stigandi. He likes it better than any bit I have used on him. His is sweet iron on the outer pieces and copper in the middle. I think it has o-rings but I would have to look to be sure. I bought it from an Icelandic breeder from Kentucky (I think) at Equine Affaire in Ohio several years ago.
He used to fight the regular snaffle (two pieces) but he is very soft with this bit. Unless I go bitless I won't be changing with him. I did buy a "pinchless" bit from Brenda Imus last year. But Stigandi did not like it so I went back to his french link. I have found my morab (very flighty mare) like the TTeam bit I bought from Linda way back in 1991. I don't know if they have changed them since then or not. But I noticed a change in her carriage the first time I used it on her. It does not make her braver but she carries her head much lower than with any other bit I have used on her. Sherrel