Apparently, according to the ini discord (discussion area), the latest update for the A300 introduced compatibility for hardware MCDUs. Perhaps there is a chance, @Mark, that this is the long-awaited data transfer function and that the development of the remote MCDU is now possible?
Are there any news regarding the A300? Long time happy customer here; would love to see the A300 being supported soon and it's been a long time since the infamous development update last July 😉