Are you aware that you can change the chord grid for each generation?
This really is a cool feature of RealBand (and I have used it a few times).
I really wish that you could save alternate chord grids that you could then call back up for specific tracks. Those would get saved with the file, so as you are working track to track, you don't have to remember previous changes.
I know I had put that on the wishlist at some point, but it would be a cool feature in that you could then generate multiple tracks (even sections of multiple tracks) simultaneously against different chord grids with one operation.