Bc2000 (for the BCF2000 & BCR2000)

I'm trying to cook up my first preset.  I'll explain what it's for later, when it's more impressive and I'm ready to share. :-)

One of the things I would like to do is a cross fade, where as one value varies from 0-127, the other value starts at 127 and goes down to 0; with both destinations being set from the same encoder.  Both targets are sysex messages.  (To a Roland JV-1080, but I doubt that makes a difference.)

I don't see a way to do this.  I'm guessing it's not there, but thought I'd ask in case I'm missing something.

Thanks!

--> Steve