Found this treasure on eBay of all places. I got two of them, and there is this gem. A new Rain-O-Mat head, half circle model. This one has a 1/2" inlet and the stem looks more like something you would see on the Rain Jet heads. There are opposing outlets that give it a spray that would see on the old Toro Rain Pro 320s and XP-300s. The screw, self explanatory. The other head is worn but I am going to see if I can clean it up. If someone wants to swap for it, hit me up.