Wheelclamp Filament Spoolholder

Novel 3d Printer Spoolholder based on the type used in London circa 1980.
Print in several sections, largely held together by 4mm screws.
The Hub part is removable, so can be substituted for other size spools. The Left and Right feet are hollow, so can be filled with sand, lead shot, ball bearings to give mass. The foot endcaps are removable.