Good to hear. One cheap way to make it read as a budget rather than as a right answer is to show the target as a number the note has to fit inside, with the note's current length displayed next to it. A player who finds a different shortening then watches it pass, and the goal reads as compression rather than as guessing what the station wanted.
Related, when somebody submits something valid but longer than the target, a message saying it fits and can still be shorter teaches the mechanic better than a refusal does.