This is how we work during a perfomance :

We (Wietse & I) both have our songbook with songs ordered the same way. In the books every song has an 'own' page-number, so we only have to communicate the next songs' pagenumber.

e.g. In my book 'New York' has pagenumber 65 and 'New York' got registration-address 'Block 15, preset 4'.
So I press 'Bankselect', 'P2', 'Reg.mem 4'.... ready !!

In my view the MF is not the correct feature to search on the fly.

Ideal solution :
On the music-stand a small booklet with your repertoir-list (database) including the Reg.mem. address.

Calling a reg.mem. adjusts the T2 and shows sheetmusic and/or lyrics-chords on a separate 15"TFT screen(s).

You can sell your other electronic-songbook Scott ..... you won't need it anymore !