How to Use & Setup GT55 Nano Gyro Receiver V4 & V5

There's something the manual doesn't tell you about...
EPA setup can be tricky but I found a way to do it easily.
Links for all available gyro combo receivers:
With case
Flysky NB4 (AFHDS 3) https://www.gt55racing.com/products/g...
Futaba T-FHSS https://www.gt55racing.com/products/g...
Sanwa FH4 https://www.gt55racing.com/products/g...
Sanwa FH5 https://www.gt55racing.com/products/s...

Without case
Flysky NB4 (AFHDS 3) https://www.gt55racing.com/products/g...
Futaba T-FHSS https://www.gt55racing.com/products/g...
Sanwa FH4 https://www.gt55racing.com/products/g...
Sanwa FH5 https://www.gt55racing.com/products/s...

Time Stamps:
Intro 00:00
How to install metal case 01:47
How to plug in servo and ESC 03:14
How to bind 03:51
Transmitter setup 04:33
How to set gyro EPA and direction 05:36
Gyro gain modes 07:15