Hello. I am trying to use my Alta X with a companion computer mounted onboard (ARM based single board computer similar to a Pi) to run missions. We are using Python-mavsdk and mavsdk server and have written our own missions based off this library. The computer is connected to the Alta X external UART connection via USB to serial connection. We followed all of the PX4 tutorials on setting this up, but we are still not having any luck. When running the mavsdk examples, the computer connects to the drone, tries to arm, then hangs. Nothing more occurs. If anyone else has done offboard flight modes with the Alta X, please let me know how!! Should I be connecting the computer to the Alta's internal UART connection? Currently that connection is being used by our FRX pro mounted onboard. Any knowledge is much appreciated.