Appointment "padding" time

Okay, first of all, LOVING this plugin. Anways.

All our appointments are 45 minutes long, but always start on the hour. I see that I can add a custom duration to make them 45 minutes, but then the schedule slots are every 45 too. So for now I have them set at 60 minutes, but then the "Lasts(approx):" and Google Calendar show 60 too. Is there a way to set up some padding time after appointments, so the duration the client sees is 45 minutes, but they get scheduled every 60?