“We agree the memorial is repeated as He commands, but there is no literal body or blood.”
There is - and that is how Christians always understood it.
“We do it in memory of His actual sacrifice until He returns. Nor is their a need or command for representation.”
Re-presentation. Not representation.
“It is finished.”
Yep. And Christ’s sacrifice can be offered to the Father at every Mass or Divine Liturgy precisely because it is finished.
No command or reality to re-presentation.
Even Christ referred to the wine as wine after saying it was His Blood.