getting style plugins working with 7.x-2.0

Ive been pulling my hair out all day trying to get my custom dynamic OL style plugins from a drupal 6 installation to work in a new Drupal 7 installation. I have managed to successfully port all my custom behaviors, but just cant get my style plugins to work in D7. (OL 7.x-2.0)

When I originally created the style plugins for D6 I referred to STYLE_PLUGINS.TXT which was supplied with the Openlayers module and was a great help, but I cannot find a D7 version of this file? Does it exist yet? If not, is there anyone that can quickly highlight the changes that need to be made to convert a style plugin from openlayers 6.x-2.0 to 7.x-2.0.

this is my custom module code.

function openlayers_custom_ctools_plugin_api($module, $api) {
  if ($module == "openlayers") {
    switch ($api) {
      case 'openlayers_layers':
        return array('version' => 1);
      case 'openlayers_styles':
        return array('version' => 1);
    }
  }
}
function openlayers_custom_ctools_plugin_directory($module, $plugin) {
  if ($module == 'openlayers' && $plugin == 'style_plugin') {
     return 'plugins/style_plugin';
  }
}

and in my "plugins/style_plugin" folder, I have this in a .inc file (with the called js file too which)

$plugin = array(
  'title' => t('Custom Style Plugin'),
  'description' => t(''),
  'style_plugin' => array(
    'class' => 'openlayers_custom_style_plugin',
    'parent' => 'openlayers_style_plugin',
  ),
);

class openlayers_custom_style_plugin extends openlayers_style_plugin {

function options_form($defaults = array()) {
    $form = array();
    $form['point_radius_min'] = array(
      '#type' => 'textfield',
      '#title' => t('Min radius'),
      '#description' => t('Minimum value for the point radius.'),
      '#default_value' => isset($defaults['point_radius_min']) ?
        $defaults['point_radius_min'] : 5,
    );
    $form['point_radius_max'] = array(
      '#type' => 'textfield',
      '#title' => t('Max radius'),
      '#description' => t('Maximum value for the point radius.'),
      '#default_value' => isset($defaults['point_radius_max']) ?
        $defaults['point_radius_min'] : 30,
    );
    return $form;
}
function render() {
    drupal_add_js(drupal_get_path('module', 'openlayers_custom') .
    '/plugins/style_plugin/openlayers_custom_style_plugin.js');
}
}


I'm not even seeing the options form at /admin/structure/openlayers/styles/add

Please, any help or direction would be appreciated.

thanks