stop mini playlist at a time

If its possible to design in a new version of raduga.
The possibility fore a track ore mini playlist to stop at a time.
Now its possible to start a track ore mini playlist at a time. But it very useful for us in holland that before the top of the hour a mini play list is started.
Now we do this by calculating the start time of the mini playlist.
Mini playlist has to stop at XX-59-58 mini playlist ore track is 3.30 long so the list has to start at XX-56-28.

This we have to doe fore every hour of the day. If it’s possible to let raduga do the calculating?