A support bracket and method for securing and supporting a superstructure for towing persons behind a vehicle such as a boat is disclosed. A user equipment may be configured for operation on multiple carriers with different configurations, e. One in 80 men weights >300 pounds and one in 200 women weights >300 pounds. The metering gate provides a less tortuous and more symmetrical flow path when the gate is partially open, but provides a relatively straight downward flow channel allowing full flow when the gate is fully open. Adapting sleeves that fit around the base of the apparatus can be used to adapt electronic device holder to cup holders of different sizes and shapes. Furthermore, the speed and the torque can also be pre-controlled in a finely interpolated form in the drive, since the polynomial of the third degree can be differentiated twice.