Hi,
I bought the TDS GTNXi 750/650 for X-Plane 12 to replace the RXP plugin and I have to say that it works great on all the aircraft I own that already use the RXP plugin (in practice it replaces almost automatically, just disable RPX and activate the TDS even if it would be better to disable RXP from the plugins).
The problem with the Mitsubishi Marquise MU-2 is that the system that allows the replacement of RXP with TDS is managed by gizmo through the configuration window for MU-2 that allows you to select the type of avionics available, which however does not detect the presence of the TDS (legacy VC Integration) and therefore does not activate it.
I believe that if TOGA does not intervene it is not possible to use the TDS on this aircraft ... at this point, I kindly ask, if this update intervention is possible.
Best regards