Be careful with sealing your mast up when its cold out, you might pressurize it to the point that it will explode on a hot day. Or if you fly with it, it will explode when the plane reaches 20,000 ft, especially if its raining when you take off as the air pressure is usually lower when its raining. I usually carry my mast on when I fly to avoid this problem. I have to fold it a couple times to make sure it fits into the overhead. And make sure you rotate the air in your trailer tires while you are at it. The old air gets denser over time and this leads to blow outs.