I have a Speed 3 12 DLX that I bought well used. It was not flying very well. I found out the line lengths were not equal, fixed them and it got better. Then checked the mixer, it was not even. Fixed it and it bacme even better, and I actually enjoyed flying it. Then, for the last two sessions it started coollapsing with no apparent reason. The leading edge collapses and the kite crumbles into a ball shape, starts looping, crashes into water etc... First time it happened I thoght i made a mistake or the wind was off, but on my last session it happened many times. I think it starts happening when the wind picks up or after a while into the session, not right away.
Anyone experienced this ? What is the proper way to fix this?