Making some good progress, not only did it power on without catching on fire, all of the stuff I have touched so far is talking to each other
Transmitter and receiver are bound and are communicating.
Managed to upgrade the firmware of the Flight Controller.
Receiver is controlling the Flight Controller, which is sending stats back to the Transmitter for flight telemetry, there was some...quirky bits with the FrSky XSR Rx and the Matek FC.
Drone is pointing the right direction(s) in the Betaflight app so the on-board gyro is working.
Managed to upgrade the firmware of the ESCs.
Flight Controller is sending info to the motors via the ESCs which are spooling up in the right directions. Will have to fine tune the spooling up revs, one slightly lags the others.
Plus I managed to configure Arm and Flight Modes in both the Tx and Betaflight.
Going to tackle the camera/camera board and the VTX this week.