A slam-capable, T-handle operated rotary latch has a pan-shaped housing for nesting the T-handle and employs a single rotary jaw that is releasably retained in its latched. The legs have nestable sections, an uppermost portion of each leg being attachable to an underside of the platform. A special golf grip having an accordion like plurality of rings can expand or contract in accordance with the amount of club length adjustment. The secondary system comprises a secondary element that is configured to receive the first modulated alternating voltage signal.