A RAM-D-101 with one round plate replaced with a RAM-D-254 ball and small footprint plate.
(RAM-D-271U-12) Ball Clamp 55mm Round Rails
(RAM-D-202U-CRO1) D-Sized Ball Base for Crown Work
(RAM-D-111U-C) Large Marine Electronic Mount (Shor
(RAM-D-2462U) VESA Plate 35x75mm
(RAM-D-247U-2) Aluminum Square Rail Clamp 2"
(RAM-D-247U-5) Aluminium Square Rail Clamp 5"
(RAM-D-202U-SYM1) Circular Plate 6 Holes
(RAM-D-162V-246U) Ratchet Extended Vertical Mount