I would use 30 ft lines for the first try. I would not try longer lengths at first unless the plane is very light, under 5 1/2 ounces. The most important consideration in control line flying is line tension, lose it and crash. Shorter lines will help insure tight lines and protection from the occasional wind gust. You will turn a bit faster though so be ready for it.

If 30 foot lines work OK, try a longer lines after a flight or two.

.008 cable is very nice to fly with but it is very fragile. It kinks and breaks easily.

Be sure to launch at the correct area of the circle with respect to the wind. Never launch into the wind like you would an RC plane.

The Skyray flies well and is very stable. Have fun!