Now you're up to 25 pounds, for a mini keyboard. If I was going to do that I'd stay with a regular sized board. For me the advantage of the KMA is its size and weight. You've just cancelled out all of that. ???
Remember it is a flight case. I will be doing lots of air and bus travel this summer. I feel confident that the KMA will not get damaged.
Last summer I traveled with a Tyros 2 in a flight case, and it was MUCH heavier. It was not fun bringing it up and down several flights of stairs, trying to fit it in taxi... 25 lbs will be much easier to deal with. My Tyros 2 in a flight is over 60 lbs and very bulky too.