Hi Nikola!
Thanks for your reaction. Basically I nall cases. When a clients makes a 45m appointment I would like to have 15m blocked as well afterwards for own administration. So clients books and sees only a 45m appointment but my calendar is blocked for an hour. Doesn’t matter which time. If it’s booked from 14:30 – 15:15 I would like to have 15:15 – 15:30 blocked in my calender as well (so that a new client can’t book immediately afterwards).   Same for 30m apointsments then I would like to have 15m afterwards as well (basically just always).
Hope this is clear, else let me know. Thanks!

(p.s. i don't see how i can react on the earlier request so therefor this solution)