msg').append('<div>The size of the mount holes is required and must a numerical value for the Sandwich case.</div>');
                error_els.push('#mount-holes-size');
                has_error = true;
              } else {
                data['mount-holes-size'] = size;
              }

              if (!$('#width-padding-toggle').is(':checked') || w_pad == '') {
                $('#width-padding-toggle').prop('checked', true);
                $('#width-padding').show();
                $('#width-pad