Oh, and that video (of the C1) just goes to show how important it is to either get the legs kit, or have a keyboard stand like a QuikLok WS540 that supports the organ at all four corners.

You can't play piano well if it's bouncing while you play, nor an organ...! (In fact, only accordions should bounce!)
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An arranger is just a tool. What matters is what you build with it..!