How do you ship seats and heads?

Haven't shipped seat but I have shipped 2 sets of heads by getting a big sheet of good heavy wall corrugated cardboard (Got a buddy that gets it for me free from the local box board factory) and lay the head on it and wrap it Christmas present style overlapping it so it's double thick all the way around and make sure it's wrapped tight and taped real good. Only takes me about 10 minutes per head and both times it's worked great. The guys receiving them said they were unharmed.