I wish you could have a look at the ability to set a custom breaktime between two services (5, 10, 15, 20 min).
This works with services that are no longer than 60 minutes, but if you have longer services there is no possibility to have just a 15 min break time (or whatever you would choose to have).
e.g one service start at 13:00 and end at 14:30 next service would then start at 14:45 with a 15 min breaktime between services.
If the problem can be solved why worry? If the problem can not be solved, worrying will do you no good.