1) Download Goblin 380 manual; very similar to Alzrc 380 Fast
2) Use FBL gyro setup software to adjust the swashplate/servo links to get swashplate level at mid-stick.
No sub-trim at all. FBL setup software always stated: no subtrim.
For Goblin 380, you are going to use the FBL setup software to adjust the swashplate level. That is the servo horn 90 degree adjustment.