If the valve is left unscrewed the sharp edges will cut the kite fabric, maybe this is common sense as no where in the manual does it warn against this.
I contacted ozone and they declined warranty saying there is no way the valve caused the damage.
I included shots, you be the judge.
If this is how ozone handle legit claims they lost a customer.
Give me a kite with the normal inflation tube, this one has caused to many problems.