I wonder if anyone has come across this problem before. After a few minutes flying I noticed vibration starting in the head. I checked the blades for tightness, etc and notice that the trailing edge of the blades had become de-laminated. Instead of a nice fine edge top and bottom of the Align carbon blades had come unstuck. It's not a problem I have epoxied them back again, just wondered if anyone else had come across this. Cheers.