Many times damage in transit doesn't occur from the case being destroyed but moreover from the horn moving around inside the case itself. What I mean by this is, say, the case iis thrown up on a loading platform. Bang, the case hits the platform and abruptly comes to a stop but due to inertia the horn is still moving inside the case. The result is a bent or mis-aligned horn. Talk to your teck and ask him to show you how to "wedge up" a horn for shipping. This will minimize key damage. (you want to know how to do it so you can remove them when you arrive and install them when you're coming back. After the horn is properly wedged then you want to pack around it in the case with either foam or cloth to keep it from moving around inside the case during transit. Then strap it shut or tape it shut with packing tape. You can then take it as is or put the whole thing in a big duffel bag so it doesn't look so obvious on the airport carrousel.