PowerBox Systems Competition SR2 Instruction Manual page 15

You need to assign a channel with +/-100% travel to a rotary control at the transmit-
ter. Even if you have not connected an iGyroSAT, this action is recommended as it
will make it easier to retro-fit the gyro.
If you have selected a thrust vector function, you will see a second query regarding
the sensitivity of the thrust vector control system. This is the method the Assistant
uses to set up the basis for a simple but effective method of adjusting gyro gain in
flight.
Once you have assigned the Gain control, press Continue to confirm your choice.
If no iGyroSAT is connected, this concludes the Setup Assistant.
If an iGyroSAT is connected, the next step is to establish the installed orientation
of the iGyroSAT:
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