Survey completed. The Control App has a simple and clean look, very straightforward. Also good job on the survey.
Suggestions:
To streamline getting track plan into the app, it would be great if users could import files from existing track planning software such as SCARM, AnyRail, etc.
When Auxiliary devices are activated within the Control App it could send corresponding sounds (with options for user provided as well as stock audio files) to a Bluetooth wireless speaker.