Rosin? The stuff that string players use in their bows to make them grip the strings?
Also, as everything seems to work OK for 80% of the range, could the tuning gang need lubrication? Try releasing the screws that secure the drum to the spindle so that it moves freely, then check both the gang and the cord drive to see which is causing the problem.
Also, as everything seems to work OK for 80% of the range, could the tuning gang need lubrication? Try releasing the screws that secure the drum to the spindle so that it moves freely, then check both the gang and the cord drive to see which is causing the problem.
