My newish true love has enabled my latest obsession and bought me a 72-bass Guerrini piano accordion! It's the new love of my life, and I'm having so much fun with it.
We're flying to Florida at the end of the week to visit his friends, and he's urging me to bring the box along. But I can't tell from the Delta web page whether it will work as carryon. I will NOT check it as luggage, and can't afford a separate seat (and the plane is full now, anyway).

What should I do???