All stories, including product stories, should have an end bug at the end of the main copy. End bugs should be preceded by a thin, fixed space.
Niche caps are used in FOB stories, but not in main edit stories.
Department heads appear in a script font in the upper corners of FOB stories, but not in main edit stories. Be aware that stories can moved at pinup, altering which ones will run in which (FOB or main edit) section.
See also Page Basics: End bugs.