I have to take my army on a plane. And there is no way I am checking that piece of luggage! So I found for cheap a piece of carry-on luggage, with the sole purpose of being my army carrier.
With some cardboard cutting and hotglue-ing, I have made a couple sectioned model trays. I may line some of them with some thin foam material for extra safety, but this should ensure my models fit securely in the overhead compartment! Hopefully.
Only 2 trays deep. The Prosecutors are turning out to be very problematic for space, but definitely more manageable with the wings conversion I did to them.