Methods and materials are provided for the production of essentially isomerically pure perhalogenated and partially halogenated compounds. A strap is affixed at both ends to the coupling body and is configured to engage the tube and hold the coupling body in place on the flat. In some illustrative examples, a user’s identifier such as his or her machine log-in identification may be associated with two or more resource sharing aliases. This permits the result of non-contacting measurements of films in a continuous production environment to be fed back to adjust the production conditions in order to improve or maintain the quality of subsequently produced film. The invention provides indicators that tell the user that more information is available in a particular direction for a menu item.