So, after moving things around and testing different positions, I'm pretty sure I want my tweeters in the pillars. So, I'm about to pull them and see about cutting the pillars to flush them in. But I'm wondering, is there really enough depth behind that plastic to fit a tweeter that's about 3/4" deep. I haven't measure them yet, but that's about what they look like. They're Focal TN52 's.