Anyone get any closer to this?
I added an Ideascale idea but I won't hold my breath...
https://line6.ideascale.com/a/dtd/12-string-effect-Digitech-Mosaic/923231-23508
That's the way I did it too, it took me longer than I'd wish to admit to find it though. Really useful though for practicing to backing tracks etc. It works great!