A mounting plate for a medical device support system includes opposed major surfaces in a thickness direction. A group of plate mounting orifices is arranged in a hexagon pattern and extends through the opposed major surfaces and defines a perimeter of an area at the major surfaces. A primary orifice extends through the opposed major surfaces, and a group of primary spindle mounting orifices surround the primary orifice and extend through the opposed major surfaces, the primary orifice and the primary spindle mounting orifices located within the defined area. An auxiliary orifice extends through the opposed major surfaces and a group of auxiliary spindle mounting orifices surrounds the auxiliary orifice and extend through the opposed major surfaces, the group of auxiliary spindle mounting orifices defining a perimeter of an auxiliary spindle mounting area at the major surfaces, one of the plate mounting orifices located within the auxiliary spindle mounting area.
