an adjustable mounting for a post system for use in aligning and maintaining a post attached thereto to a desired vertical attitude to a ground surface . the adjustable mounting includes , as embodiments , a ball segment and seat combination that are movable with respect to one another , and in another embodiment involves a pair of interactive tapered washers , with the embodiments all including arrangements for clamping together the components that is a single bolt type fastener that is for maintaining the components of the adjustable mounting between a ground stake top surface , or ground surface , and a post bottom end or post insert base . the relative positioning of the seat to the ball segment and the tapered washers tapered surfaces to one another is to provide an off - set from a straight line axially through which adjustable mounting , that is transferred directly into a post , or a post insert with a post telescoped thereon , as an angle of that post to the vertical , which post can be used as a fences post , sign post , or the like , and may include an arrangement for mounting a container , such as a box or tube , cantilevered thereto that is intended for receiving delivered items , such as mail and / or newspapers .