OK, Flew into a pine tree at about 160ft altitude. Recovered Phantom at base of pine. Camera/gimbal broke free but appear to have sustained no damage!! I have been flying without the hard plastic drop pins for about 200 flights - this confirms my suspicions about drop pins. Battery was ejected from the Phantom on impact. I have now tested her twice since the crash and on both occasions she hovered for perfectly for about 3 seconds after launch, then flips and hits the ground hard, motors still running. The Vision Assistant said no IMU calibration required, so I have not bothered to recalibrate. I have removed the cover but everything looks normal. Motors spin freely. Any suggestions? ESC damage? Compass?