The Wimberley AP902 Sidekick Shifter Kit is a precision accessory designed to optimize the balance and performance of telephoto lenses when used with the Wimberley Sidekick gimbal head. This combination shifts the base mounting position of the Sidekick away from the ball head, repositioning the lens center of gravity closer to the ball head center for superior balance and stability. The kit includes a shifter block and two spacer plates that attach securely to the Sidekick's bottom mounting base using pre-drilled mounting holes. This configuration is essential for achieving optimal performance with specific telephoto lenses where standard mounting would compromise balance and functionality. For some larger lenses, the shifter kit may be used in conjunction with a quick-release replacement foot to further reduce the lens profile, though most compatible lenses work effectively with standard quick-release plates. The AP902 provides photographers with enhanced control and stability for wildlife, sports, and nature photography applications where precise lens positioning and vibration reduction are critical. Constructed with durable materials and precision engineering, this accessory maintains Wimberley's reputation for reliable photographic support equipment that meets professional standards.