Culver City's Hayden Tract has long served as an architectural playground for Eric Owen Moss.  In recent years, the SCI-Arc director has designed a variety of undulating structures that decorate the former industrial neighborhood, including a vertical cactus garden and the Samitaur Tower (a familiar landmark to Expo Line passengers).   Moss' latest creation is a four-story mini-tower dubbed "Waffle," currently taking form on Hayden Avenue.  World Architecture News reports that the project will stand 55 feet tall, containing a conference area, mezzanine lounge, closed meeting space and a rooftop deck.  Waffle is a unique adaptive re-use project, utilizing the frame of a 60 year old former industrial press.  Signage is also up for Moss' proposed 12-story office building at the corner of Jefferson and National Boulevards, although work is not imminent for that project.