[Texman]

Especially with paper models, I have found that making a cradle out of foam core, with one panel for the nose, aft fuselage, and one for each wing, seems to work well
for me. It keeps the landing gear off the floor of the container, and keeps the model
from moving around as well.

Multiple models can be put into each box, by layers, by glueing blocks to the side of the box to hold up a second or third layer of foamcore, essentially making a false floor.

I hauled my models by air up to Sterling for the IPMC last year, and the only damage was my fault when I was removing one of the models from the case.