It would be very helpful if when you create a Service Option group that you can use that same group on another service by toggling it on. That way if there are standard addon types that you create for Lashes, or Nails, or Pedicures, etc. You can turn on the option group for the service without having to recreate them for every service. I envision that the service option group page would just show all possible groups with a toggle on/off slider and still option to create new groups.