page.tpl.php override for Panels Pages? I want to use a specific tpl.php file for all Panels Custom pages. 

I get some formatting issues if I try to use "Panels Everywhere" module, so would like an alternative.
You can use a template_preprocess_page function to add your custom tpl for Panels page. Here's how:

/**
 * Implements template_preprocess_page().
 */
 function MODULEORTHEMENAME_preprocess_page(&amp;$variables) {
    if (module_exists('page_manager') &amp;&amp; count(page_manager_get_current_page())) {
        $variables['theme_hook_suggestions'][] = 'page__panels';
    }
 }


Then create a page--panels.tpl.php for your custom Panels page.