Replace Views grid view with blueprint spans

Don't know if anyone else will find this useful but I was working to replace the grid view supplied by the views module with BP spans. Here's what I have so far. It seems to work except for the part where you have to determine what the center column width is. I wasn't sure how to get that pulled into the template page and how to check whether it's two or three columns so I have a hard-coded value of span-18.

(goes into blueprint/views-view-grid.tpl.php)

<?php if (!empty($title)) : ?>
  <h3><?php print $title; ?></h3>
<?php endif; ?>
<div class="views-view-grid">
    <?php foreach ($rows as $row_number => $columns): ?>
      <?php
        $row_class = 'row-' . ($row_number + 1);
        if ($row_number == 0) {
          $row_class .= ' first';
        }
        elseif (count($rows) == ($row_number + 1)) {
          $row_class .= ' last';
        }
      ?>
      <div class="views-grid-row <?php print $row_class; ?>">
        <?php foreach ($columns as $column_number => $item): ?>
        
        <?php
        $colspan_number = intval(18/((count($rows,1)/count($rows,0))-1));  /*the 18 here corresponds to the center column span width, not sure how to pull this from the preprocess variables*/
        $column_class = 'span-' . $colspan_number;
        if ($column_number == 0) {
          $column_class .= ' first';
        }
        elseif (count($columns) == ($column_number + 1)) {
          $column_class .= ' last';
        }
      ?>
          <div class="<?php print $column_class; ?>">
            <?php print $item; ?>
            
          </div>
        <?php endforeach; ?>
      </div>
    <?php endforeach; ?>
</div>