For me, the whole 76 and a CS thing falls very naturally into how many pianist/singers accompany themselves. Put the arranger into Pianostyle Mode, with Bass Inv (ON Bass) on, play a little intro, then hit the CS. You now accompany yourself singing the first verse and chorus (or head, whatever), and the Pianostyle tracks your comping AND whatever inversions and slash chords you want. So, you now have your backing.

Now, you hit the CS Play, change setups to maybe more a pad/lead sound and solo your little brain out, go back to the Pianostyle setup, do a bridge in realtime, then hit CS Play again, and now go to a setup with maybe some horns in. Sing another verse, play the horns around it. Still no need to tie up anything playing the chords, so those horn voicings can be MUCH wider and accurate.

And so on, and so forth...

It's basically like being in arranger mode, then going seamlessly to an SMF, then seamlessly back to arranger, and back again, except the SMF's don't need setting up in advance, and you can vary them on the fly, depending on your mood or the audiences.

Revolutionary hardly begins to describe it..!
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An arranger is just a tool. What matters is what you build with it..!