To answer my own original question I have a genuine pixracer and it works fine. I am unable to see the SYS COMPANION on the clone board. Not sure why so guess that will remain for APM only.
Looking forward to first flights..
I am just building my first PX4 to join the group and help test / improve OSD. PX4 is new to me and its all configured up fine except I have no option in sys_companion to add osd.
Any ideas? Am using a pixracer clone. (EDIT: I have spent so much time without success I have now ordered a real one!)