There is a huge market for such a keyboard. If you search the net, you'll find dozens of posts by people who are just as frustrated as we are that there is no decent portable digital piano solution. It gets to the point where, as Flieger wrote, people start sawing perfectly good keyboards apart to make them smaller! I read two posts by people who took Yahama digitals to electrical engineers for similar modifications. Unfortunately, that's just way too expensive for most people.
Roland missed the mark with the RD-64, in my opinion. For people who never fly, fine—it works. But it can't work for air travel, even if they advertise it for such.
A digital piano suitable for air travel must:
1. Weigh less than around 25 lbs. This is because you need to keep the total weight, with an ATA flight case (which usually weigh around 25 lbs themselves) under 50 lbs (23 kg), in order to avoid overweight baggage fees (usually $100 per item). The Roland with a hard case comes in at over 50 lbs.
2. Next, it needs to fit in a case of which the sum of all the sides (h+w+l) must be under 62" (158 cm). This is to avoid the excessive size fee (usually $200 per item). The smallest case that fits the Roland is well over 62" linear inches.
I spent a week trying to find a fully weighted keyboard that met these criteria, before giving up completely. If you decide to fly with say, an RD-64, you would be looking at:
$300 flight case
$100 overweight fee x2 (roundtrip): $200
$200 oversize fee x2 (roundtrip): $400
So that's potentially a total of $900, including the case, just to take your piano on one trip!
I was going to be stationed in Hong Kong, but I've been moved to Moscow. And I'm not taking any keyboard with me. I am hoping to find a weighted controller to use with Pianoteq when I get there, for less than the fees would have costed me otherwise. That's long term though; there's still no solution for shorter trips.
