My friend Bill Manske sent me a link to his new video of his Wolfe plow and I thought that some others on here might enjoy it.  There is footage of them installing several different sizes of tile, but the 18" dual wall is towards the end.  It's pretty impressive to me that they can drag a boot that size through the ground.  I'm also sure that Bill is the only guy not working his butt off in that portion of the video. :)  I told him I'm not interested in being the guy picking those pieces of tile off the ground and throwing them up onto the machine every couple of minutes.

Hope you like it.  Bill reads and occasionally posts on here, so I'm sure he'll answer any questions.

Mike

http://www.youtube.com/watch?v=Wd3mEgx-4o0