A flexible tip IA tip assembly includes an elongated sleeve for protecting an eye capsule wound through which the sleeve is inserted and for containing irrigation fluid. A remote control communicates with the ball shooting machines and is operable to selectively control the firing of each shot from any of the machines at a time and from a direction which is directly responsive to a tennis shot made by a practicing player on the opposite side of the court. The sludge lance rail has at least two types of nozzle assemblies that may be attached thereto.