Funny thing before the schism and at Florence it was used by the orthodox. Not sure what your point is :)
First of all, no, you're wrong. The Orthodox admitted themselves that they have never owned this artifact before. Secondly, you're dismissing the schism as if it's a matter of little import. It is most certainly NOT. The Orthodox have, ever since the schism, been severed from the Church of Jesus Christ. You are defending the handing of artifacts over to heretics and schismatics who even themselves admitted they had no claim to them.
You claim to be an Eastern Catholic but time and time again you refer to the Orthodox as if they are members of the Church. They are not, and you're starting to sound like you're one of them.