POWERTEC 71387 110" Guide Rail Joining Set for Makita or Festool Track Saws Includes 2x55" Aluminum Extruded Guided Rails and (2) Guide Rail Connectors for Woodworking Projects - - Amazon.com
TSO GRS-16 Guide Rail Square for Track Saw Guide Rails
DeWalt, Makita & Festool Track Saw Head To Head [Teaser Video] - YouTube