Hello all. I purchased a Holybro Pixhawk 5X controller and configured it in Mission Planner. All was going well up until the ‘radio calibration’ in setup. No matter what receiver I use (FRSKY RX 8R, X 8R (SBus) or even a FLYSKY FS-IA6B ppm receiver), the 5X doesn’t recognize it. The FRSKY receivers pass along full telemetry and even YAAPU is working flawlessly on the transmitter. Everything points to the 5X ‘RCIN’ connection. Any idea or clues as to what outside of a lemon maybe causing this. Thanks in advance.