As somebody who is resposible, (ultimately), for the packing of high value, very fragile audio parts, its actually better to use less packaging with a little thought.
The big boys now use their vacuum moulded or card fold up thingy's which, a) use less material than the old style expanded polystyrene, and b) actually introduce far better shock absorption by dissipating the impact more effectively by careful design.
When I ship anything it follows the same principles I use in the day job, and I've managed to ship completed kits with no problems so far.....(waits for the wrath of the Gods to fall on him!!).