Transparent header as default

I’ve searched through here and have found some old threads on this, but the various solutions no longer seem to work. I assume it is simply due to the many changes that have occurred over the years to the core code. As we can set defaults for the sidebar and footer for the various display options, it would be great for the header transparency to also have a modular setting for a user set to default, such as having a transparent header by default. Here is some old code that apparently used to work, but no longer does:

add_action( 'after_setup_theme', 'enfold_customization_product_switch' );
function enfold_customization_product_switch(){
	add_filter('avf_builder_elements', 'avf_builder_elements_mod');
}

function avf_builder_elements_mod($elements)
{
	$counter = 0;
    foreach($elements as $element)
    {
		if($element['id'] == 'header_transparency')  {
            $elements[$counter]['std'] = 'header_transparent ';
        }

        $counter++;
    }

	return $elements;
}