Funny behavior with your stabilizer? Then first try these things before installing a new one:
Before you connect the battery; make sure the Robara is on the ground and level. Then connect the battery, wait for 3 seconds, done. make sure you trim the model in expert mode before your launch!
Make sure the Stabilizer is always glued in the way the Robara is sold! It’s sensitive for a change in position!
make sure all your connection are OK and the wingservo’s are plugged in correct.
If all of this still doesn’t help then it’s time to remove the old and install this. Please send us a email if you have any questions!