One thing I see little of here is a bit of complaining to Yamaha (and to each other) about why Yamaha chose to make the Tyros series in such an unusual size for a 61. As Yamaha don't make custom cases for them (AFAIK), it seems a PITA to have to use a 76 case just to fit them...
IMO, if you HAVE to haul a 76 case, might as well play a 76!
But, be that as it may, I'm sure if enough of you started to complain about the form factor, Yamaha MIGHT be able to shrink it to something that fits most regular 61 cases...
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An arranger is just a tool. What matters is what you build with it..!