Hello Jenna!
I use the following settings for our instruments with Finale:
Master Volume: CC7
Expresion: CC12
Velocity XFade turned on and set to CC11
Finale HP Preferences/Dynamics/Volume/Dynamic Approach for Sustaining instruments: CC#11
Some earlier Finale versions had CC7 and CC11 mixed up. I don't remember which versions had this bug exactly, but if you happen to have one of these versions, you may have to set the Dynamic Approach setting to CC#7 in Finale.
I wouldn't use Velocity XFade for Harp, Piano and percussive instruments.
Best regards,
Andi
Vienna Symphonic Library