A workstation comprises a support and a carriage mounted on the support and movable relative to the support. The carriage supports a work platform. A counter-balance supports the carriage and the work platform. A lock mechanism locks the carriage relative to the support in a desired position. The workstation may comprise a swing arm attached to the support at a vertical pivot such that the support may pivot relative to the swing arm. A method of operating the work station is also provided comprising moving an actuator to retract the pin from the rack. The weight of the support is supported by the counter-balance. The carriage is repositioned and the actuator is released to allow the pin to move to the extended position where it engages the rack.