Larry,
The handle is a 15 inch piece of broom handle with a hole drilled one inch from each end for the two lines, thereby giving the control we are used to.
The lines are 85' of 50# dyneema (same as spectra)
Even though I flew combat and rat race in the 50's, 60's and 70's, when I started back, I was having trouble with figure 9's ending a flight. Then Tony G., Howard Rush, and Schultzie each provided info about stunt kites including the one about both lines on one handle. Best advice I have ever been given since I started flying in the early 1950's. Flying back and forth from one side to another quickly gives way to the intuitive eye, hand, and brain coordination that instinctively turns the handle the way you want to go.
Pattern maneuvers are limited to mostly rounds (inside loops, outside loops, horiz eights and vert eights). You can even do a wing over with a top about 80 deg rather than 90 deg. I haven't been able to do more than 2 corners of a square loop.
For retreads and beginners, the stunt kite is the best training tool I have ever seen. If I had one back in the 50's, I would have been a better combat flier. If one gets rid of their inhibitions with this, then there is no need for an indestructible trainer.