Magento & Nosto: How to add Star Ratings to Nosto recommendation templates

nosto-stars.html

<!--
/**
 * Add this markup to the recommendation template in your Nosto control panel
 */
-->
<div class="ratings-wrapper">
    <div class="ratings">
        <div class="rating-box">
            <div class="rating" style="width:$!product.tags1.get(0)%"></div>
        </div>
    </div>
</div>

product.phtml

<!--
/**
 * Copy `/app/design/frontend/base/default/template/nostotagging/product.phtml`
 * into the same location in your own theme to override the original file.
 *
 * Add the custom mapping section below to the end of the `nosto_product` div.
 */
-->
<div class="nosto_product" style="display:none">

    <!-- Existing Nosto tags should be here... -->

    <!-- Custom mapping -->
    <span class="tag1"><?php
        // Get star rating
        $storeId = Mage::app()->getStore()->getId();
        $summaryData = Mage::getModel('review/review_summary')->setStoreId($storeId)->load($product->getId());
        if ($summaryData['rating_summary']):
            echo $summaryData['rating_summary'];
        endif;
    ?></span>
    
</div>