* [http://www.stratasys.com/-/media/files/documentation/fdm/F123-Series/Operation-Guide/F123_Series_Operation%20and%20Maintenance_REV_A.pdf/ Operation and Maintenance Manual] | * [http://www.stratasys.com/-/media/files/documentation/fdm/F123-Series/Operation-Guide/F123_Series_Operation%20and%20Maintenance_REV_A.pdf/ Operation and Maintenance Manual] |