Bachus, most of us have, at least at one time in our lives, had stacked keyboards. And, for the most part, those of us that have been there and done that will never, ever go back to that configuration again. Fortunately, today's arranger keyboards, MOTL and TOTL have everything we need in a single package.

I could be wrong, though, wink

Gary cool
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PSR-S950, TC Helicon Harmony-M, Digitech VR, Samson Q7, Sennheiser E855, Custom Console, and lots of other silly stuff!

K+E=W (Knowledge Plus Experience = Wisdom.)