I'm due to fly to Oz on saturday, and was thinking I'd take the P3P in a hard (peli-style) case that I have, on the plane. This will be as checked luggage, with the lipos obviously in my hand luggage. However, I also own a Manfrotto D1 backpack which it will fit in, and I was wondering whether people here would advise to take it in the cabin, or to use the hard case in the hold? I figure I can take better care of it in the cabin, but the backpack is pretty large (it exceeds the dimensions allowed by a cm or 2 for depth) and there is more risk of funny business with security potentially. I figured that as hold luggage it's just another hard case, and they are pretty indestructible. what would you do?