# nitro/lib/nitro/scaffolding.rb:300
    def scaffold(klass, options = {})
      o = {
        :pk => 'oid',
        :name => Scaffolding.class_to_name(klass),
        :plural_name => Scaffolding.class_to_list(klass),
        :mount => true
      }

This improperly applies the new options to the default in all cases, even if there are already some specified. Perhaps

      o = scaffolding_classes[klass] || {
#         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
        :pk => 'oid',
        :name => Scaffolding.class_to_name(klass),
        :plural_name => Scaffolding.class_to_list(klass),
        :mount => true
      }

should be added.