They messed up and sent bare ones instead of PTFE. I told them and they sent replacements free and told me to keep the ones they originally sent.

I think they might be different designs as the rings are very different in diameter.

Titanium is strong but brittle. a little bending and the legs snap off. I used the can opener on my Gerber pliers as a mini pry bar to break the spot welds...they're weaker than the Ti. A little filing to take the burrs of and I was done. I wrap it in some cotton cloth to keep it from rattling.