The inventive technology, in embodiments, relates variously to item support apparatus that offer one or more of a variety of operational benefits, including but not limited to independently operable force enhancers whereby various retention forces may be enhanced independently of one another, and side-assembly. The inventive technology presents, generally, two different types of apparatus—one featuring a ball having a passage through which an item support rack member (e.g., a drum rack member) may be slidingly passed, and a second featuring a ball without a passageway therethrough.