MarkThompson;7170021]The idea of ad orientem was never to face the Eucharist in the tabernacle. This is why the term is “ad orientem,” not “ad tabernaculam.” Having a tabernacle containing previously-consecrated Eucharist is not necessary and adds nothing whatsoever to the Mass. Nor has tradition ever promoted the notion that one should not turn one’s back on the Eucharist – in fact, in churches constructed with the altar at the west end (like St. Peter’s in Rome), the entire congregation would turn its back on the altar at the moment of the Consecration to face east.
At the moment of conecration the Lord in the Eucharist is on the Alter and so if you are facein the Alter in use are doing so correctly.
FWIW, this is exactly the kind of confusion and misunderstanding about the proper role of the tabernacle in the Mass that led many to move the tabernacle and put it somewhere else – just like confusion about the proper nature of the Eucharistic Species led to the withholding of the Chalice from the faithful a few centuries prior as a corrective measure.
FWIW it is confusion about this that has lead to the decrees that the taburnacle is to be placed in the postion of promenance in the middle of the main alter or a side alter
Placement of the TabernacleWhat the Church Says
“The tabernacle is to be situated in churches in a most worthy place with the greatest honor.”
—Catechism of the Catholic Church, No. 1183
“The tabernacle in which the Most Holy Eucharist is reserved should be placed in a part of the church that is prominent, conspicuous, beautifully decorated, and suitable for private prayer.”
—Canon 938.2, Code of Canon Law, 1983
“The tabernacle in which the Eucharist is kept can be located on an altar, or away from it, in a spot in the church which is very prominent, truly noble, and duly decorated.”
—Inaestimabile Donum, Pope John Paul II, 1980
“According to directives of the Holy See, since the Second Vatican Council, tabernacles are always solid and inviolable and located in the middle of the main altar or a side altar, but always in a truly prominent place.”
—Catholic Dictionary, 1979
“Locating a tabernacle on an altar always remains a valid option.”
—Ceremonies of the Modern Roman Rite
“The Blessed Sacrament should be reserved in a solid, inviolable tabernacle in the middle of the altar, or in a side altar, but in a truly prominent place.”
so that is not the case it is now ans always has been that the taburnale should be on the main alter it can be on a side alter in a place of dignity. and prominence.