Working title vs TDS GTN 750
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From the manual:
Black Square aircraft have hot-swappable radio panels that allow you to fly with many popular radio configurations from old-school no GPS panels, to modern installations with touchscreen GPS navigators. To adjust which configuration you’re flying with, use the switches on the copilot’s side of the main panel, above the environmental control panel, to select your preferred radio for Com1/Nav1, and Com2/Nav2. The radio selection will be automatically saved and reloaded at the start of a new flight.