Just got one of these from someone, its a 5m. All they said was that you need to work it or it collapses has anyone else got any info on them like the wind range etc.?

Not so much work it as watch it, with any fast kite, if you leave it near the edge of the window and it gets hit by even a small gust the kite will speed up and fly right out of the window and luff. You have to be even more careful when flying the kite to the edge, with the head of speed it has there's a good possibility of it flying right past the edge.

One good option is to keep the brake lines a hare tighter to slow the kite down for you, either that or you have to watch them, at the first sign of the kite overflying you'll have to apply the brakes yourself.

5m once you get used to it should be in the 10-20mph range. Starting at the lower end of course. Fast kite, beware the apparent winds.

what lines should i use for this kite. It came with none I have a set of lines that came with a blade 7.8 and some for a beamer 3 3m or should I buy some new ones?