No attempt is made to describe the building process here. My original description in the Halloween-l list is still archived somewhere and there are others who have built this system that have excellent documentation available.
Here are some images of components in my system. These components have some modifications (the guide wheels) left in from an attempt to modify the system for heavier ghosts. This setup around my house has five turns, or corners, as I refer to them. Two of the wheels are on a large maple tree, one is mounted on a tall post, one on the eve of the house and the drive wheel is mounted on a fence post.
Video of the ghost flying (two formats) Windows Media Format (861k) and Quicktime (2.6MB)
Images
My original ghost flying
Newer Drive Wheel
Older Drive Wheel
Looking up at the drive wheel
Closeup of the leading guide wheel
Old sewing machine drive motor
The motor speed control
A house-mounted corner wheel
A corner wheel mounted on a tall post
Two wheels on a tree
A closeup of one tree wheel
Closeup attempting show that adjustments are in 2 axes.
Several spools of the crabpot line I use
Another shot of the line
The Ski-lift style "Upside down J" attachment from ghost to line
Another view of the attachment
Closeup of the line attachment device
 
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