I'm afraid I may be in the same boat as Igora, given his entry in this thread.
In QMB, B24D shows as flyable, yet, when selected as such, only external views are available, with no apparent ability to control the aircraft.
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Even so, she is one great addition to the game, perhaps more in line with what most folks picture when thinking of a Liberator than the game's stock J model.

Thank you, Riken, and thanks to anyone who sheds light on what I'm missing with my 4.10 SAS modact setup.