One exercise I used to do with bands was build two presets for a song. If it used piano and horns (or really whatever!) make one preset with piano at the bottom and horns on the top, then the other with them reversed.

Then every now and again, perform the song using the ‘reversed’ one live.

Sometimes you can pull them off without much difference, sometimes the technicality of one part or the other makes it impossible, and you find yourself inventing something new that works, that you might never have done using the conventional layout. Occasionally, the new way sounds better, or fresher, at least (especially on tunes you play so often you end up rote on them).

You want to work that left hand, try it sometimes! Most arrangers will let you trigger chords from the RH side of a split, do the chord recognition from the RH and play a solo (or turn off the ABASS and do a proper bassline!) with your left hand…

It’s a good remedy for the atrophy that arranger players’ left hands often develop… 🎹😎