Do >all< Serial Mode devices have the 20-track limitation? Even if they do - 20 is not a strict threshold for the warning - the user should have an empty slot to save their search track (without having to decide in the field which assignment track to delete), and they might have old tracks. So, more of a soft warning when track count is above 15 or so, and maybe an additional hard warning or abort if track count is above 20?
Do >all< Serial Mode devices have the 20-track limitation? Even if they do - 20 is not a strict threshold for the warning - the user should have an empty slot to save their search track (without having to decide in the field which assignment track to delete), and they might have old tracks. So, more of a soft warning when track count is above 15 or so, and maybe an additional hard warning or abort if track count is above 20?