[Bill Cummings]

Go to 4:20 just before the in flight emergency occurs.
Sometimes the rear wires tang will etch/scratch the down tubes while folded in the glider bag. The rubber guard gets out of position and the tang comes in contact with the inside of both down tubes. The failure location looks about right for transport damage to the down tubes from the rear wire tang on the keel.
Any other ideas anyone?

[SamKellner]

S**t ........... I woulda had a heart attack. He did a super job of controlling the glider to land.

What modle glider is that? Xtra2lite?

And that first glider that launched forgot to install the crossbar