hi,

am using KK 5.5 flashed with X configuration n FS-CT6B transmitter & receiver set.. I tried many days to stabilize the flight but failed.. today lift off was successful but it was spinning too much n hit the ground.. this happened a couple of times n i  stopped trying.. any solutions?

check propeller configuration and spinning direction.
Read about yaw gyro reversing this may be one possible cause.

prop configuration is correct.. quad is spinning in clockwise direction.. and yes, i was thinking about gyro reversing n ll check that.. Thanks..