This short video is part of the PACHRAY build guide which will be released soon in web page format.
After you solder the XT30 and the capacitor, you need to test motors in Betaflight configurator. To do this, flash latest firmware, activate the DSHOT600 protocol for ESC and bidirectional DSHOT.
To test motors: go to the MOTORS tab and spin each motor individually to maximum speed with fully charged 4s LIPO. (!!!Do not spin motor at maximum speed for more than 1 second!!!). After checking each motor, spin all motors together with 20-30% speed and make sure that the RPM telemetry shows the same value for all motors.
The goal of the test is to make sure the ESCs are working correctly, the motors sound clean and one or more motors don’t get hotter than the others. If one or more motors crackle and overheat, you need to fix the problem before you will finish assembly of your quad !!!!