Whether modifying a floorplan to make it wheelchair accessible, adding larger windows or deleting windows, or replacing a queen bed with twin beds, Sunline often modified existing floorplans for a customer's needs. One notable customization is the Breath Express, a custom 2004 Sunline Slide Room built for the American Lung Association of Eastern Connecticut as a mobile exhibit to teach school children about the effects of smoking and asthma. Sunline also assisted one of their dealers, Rayewood Trailer Sales of Sussex, NJ, with providing a 2001 T-360SR to a demolition crew working at the site of the World Trade Center building #7 after the September 11th attacks. Sunline matched employee donations and donated $1200 to the American Red Cross for disaster relief.