You come way too close to the Eucharist as a feat and product of incantation and magic, rather than the pinnacle of intimate relationship with Jesus.  Do you really think Jesus checks each presider's ordination credentials at every mass, or does He fulfill His promise that He is present when we gather in His name to remember Him in bread and wine?  All these past centuries of Luthern, C of E, Presbyterian, and other Protestant congregants have been without Jesus' real presence because their ministers havent been validated by Rome?  

This thinking makes Jesus way too small, petty and limited by institutionalized conformity and negates both the promises of Jesus Himself as well as the infinite power of God.