Thanks. I had to go look further.
animated version:
[youtube]y39152VWCPk[/youtube]
The real thing. Pretty amazing but even with all the perfectly designed fits--still--- Nothing takes the place of sledge hammers.
[youtube]5eEV0_9lVU4[/youtube]
Disassembly is in reverse until they get low enough for a mobile crane to reach the horizontal sections