You do realize that the Aristotelian First Cause is not a designer, right? That would be the Neo-Platonic demiurge.-Your observation is fine, as far as it goes. I'm content with sticking by the definition that whatever the first cause is, there is nothing behind it in infinite regression. -I am a fan of Edward Feser's new book "The Last Superstition", 2008. I suggest reading it.