If you want to make your life just a little bit easier, use a servo tester to center your servos before you install them into your helicopter. On the Goblin 380, you can't get the arms off once you install them into the helicopter. You can do this with the gyro, but doing it this way is just a little faster IMO and helps save some time in the setup process.

Products Used In This Video

BK DS3002HV Servos
https://amzn.to/2P70DqP

Servo Tester
US$5.99 EK2-0907 Updated Servo Tester Server Electronic Speed Controller RC Parts from Toys Hobbies and Robot on banggood.com

HobbyWing 60a ESC
US$68.65 14% Hobbywing Platinum 60A V4 Brushless ESC For RC Model RC Parts from Toys Hobbies and Robot on banggood.com

Goblin 380 Battery
https://amzn.to/2IxVk2j

Scorpion Tool Kit
Scorpion High Performance Tool Set (10 Drivers) [SCP-1009] | Cars & Trucks