Abstract: A work station for assisting a worker in applying the trim components to a partially assembled seating unit consisting of a seat frame and both seat and backrest cushions. The work station comprises a pedestal for receiving and supporting the seating unit in an inverted position. A vertical compressor is operable to compress the seat bottom cushion while, at the same time, permitting rotation of the compressor and the pedestal about a common vertical axis. This facilitates final installation of the seat bottom cushion trim. In addition, a second essentially horizontal compressor and a pair of manually operable seat back rest trim cover stretchers are provided for assisting the worker in the final assembly of the seat back rest trim to the seating unit. All power assist mechanisms are preferably pneumatically operated.