A computer-assisted orthopaedic surgery system includes a device for generating a three dimensional geometrical surface model of a first bone and a database containing three 3 dimensional implant models of a plurality of available implants. The master communication device includes a processor which receives information on game play conditions andor player and game object locations, analyzes the information, and formulates an appropriate coaching instruction which is transmitted to one or more selected players. The telescope system detects motor torques on the AZ axis and the EL axis, predicts deformation of a telescope due to the wind force from torque signals of the motor torques and a pointing error due to the deformation and feeds back the deformation and the pointing error to AZ and EL command values to perform correction of the pointing error. The axial reinforcements provide the required strength and stiffness properties of the overall structure, while the more resilient unreinforced or lightly reinforced high strain matrix of the global structure provides the assembly with the ability to undergo large elastic buckling. Each orifice is provided with an attachment mechanism upon which is attachable a swivel inlet. Each gap is formed between circumferentially-adjacent bearing elements of the plurality of bearing elements.