The easiest way to ensure that your preferred SweepStar is sent to your booking is to create a recurring booking (such as once per week). The booking system will allocate the same SweepStar for all bookings in that series, wherever possible.
We try to send the same SweepStar, but sometimes your regular SweepStar may be unavailable for various reasons. The SweepSouth policy is to maintain your services, and as such as replacement SweepStar will be assigned to your booking.