A server for disseminating a video file to mobile subscriber over a mobile communications network is disclosed. A triggering mechanism has a blade tip opening and is mounted to the body. The QoE-aware system can extract the at least one QoE metric in a function layer from a QoE reporting layer. The cleaning liquids are then removed after the bowl stops rotating at the lowest point of the bowl. The cross-shaft can be located in close proximity to the guide rods and the output of the motor shaft so as to provide a compact package.