How to reference an ET metabox

I have asked this question on the ET forum but it isn't resolved as yet. I'm not sure if it is an issue around ET templates or just me not knowing how to reference something correctly.

I would like to hide the ET Page Template Settings metabox. I have hidden some Wordpress metaboxes using the code below. As you can see I've tried to hide it using et_ptemplate_meta as the id but this isn't working. Am I referencing it correctly?

function remove_my_page_metaboxes() {
remove_meta_box( 'postcustom','page','normal' ); // Custom Fields Metabox
remove_meta_box( 'postexcerpt','page','normal' ); // Excerpt Metabox
remove_meta_box( 'commentstatusdiv','page','normal' ); // Comments Metabox
remove_meta_box( 'trackbacksdiv','page','normal' ); // Talkback Metabox
remove_meta_box( 'slugdiv','page','normal' ); // Slug Metabox
remove_meta_box( 'authordiv','page','normal' ); // Author Metabox
remove_meta_box( 'pageparentdiv', 'page', 'normal' ); // Page attributes box
remove_meta_box( 'et_ptemplate_meta', 'page', 'normal' ); // ET Page Template Settings Metabox