HI - I have just rebuilt a FSX GNS530 to work with Mobiflight/FS2020. I did so on the strength of the Youtube 7.10.x Beta video that showed it driving the 430 but am not seeing the same options on Mobiflight at 9.4.
Does your system still work and if so - is there a way you could run me through the setup? I’d pay! 
Best regards, Ian