Hi everyone. I just picked up a second hand M600 with rtk and I have a question. It appears to be a standard M600 but the A3 fc has the 2 extra IMUs plugged in but no extra gps antennas. Could this be because of the RTK unit. I have the standard A3 on another drone and it only comes with the main fc and no extra IMUs. They are the exact IMUs that come in the upgrade kits. If anyone has come across this before please let me know. Thanks.