Once I had to ship a pretty big and heavy model with very spindley legs. I lined the box with crumpled up newspaper, to which I then added some paper towels that I tore into long strips and made kind of a nest. I wrapped the model in more paper towels and carefully set this into the the box and covered it all with more strips of paper towels and more crumpled balls of newspaper. I set the newspaper in a way that prevented the model from shifting around the box and it traveled about 1100 miles with no damage at all. I have done the same thing with a car model and the mirrors didnt even come off. Just make sure there is enuff of a buffer zone between the box and the model itself and it's prevented from shifting, even a little bit. Another time I had to send something delicate and I went to a local department store here and asked for some of that styrofoam packing stuff, (kinda looks like foam peanuts) and they gave me a box full for free, otherwise it just would have gone into the garbage.