The part that makes me nervous is reversing the rudder and making sure the Gyro is correct.
Just yaw, turn, the heli with your hand to the left, CCW. Heli should be powered up with the motor unplugged or throttle hold on.
The gyro should correct in the direction of right rudder input which moves the slider towards the tail case (away from the blades).
If it does that, the gyro is correcting properly.
Do this in HH mode because the slider will stay in the direction it moved making it easier to see.
Again, this is one of the few things that is actually explained well in the manual.