// details in arcs FN=40; toplength = 1500; topdepth = 630; topheight = 50; topbeamthickness = 45; topsidewidth = 65; topsideheight = 80; topslitdepth = 20; topslitheight = 14; connectorheight = 100; connectorthickness = 30; connectorgroundoffset= 200; benchheight = 960; standbeamthickness = 70; standoffset = 50; standsideoffset = 100; standvertoffset = 50;