Thought you might care to see this short video. http://www.youtube.com/watch?v=iwpo40zZEMI
Our first attempt at a duplex aerotow. Very low-tech.
You can't tell from the pictures, but the tug was "specked out" by the time that the gliders released.
DG 1000 gliders, 2.6m
T180 tug with SC .91