Yes going to weld the plate to the square.. Thinking I might just make a new one on the lathe out of thicker stock and tap with a bottoming tap and a stop on the drill press. Easier than welding cups I think. Plus ideally I would have "clocked" the pump 45 degrees so the pickup is in one of the corners as it hits the side of the tubing right now. It's easy enough to make a new one and transfer punch the holes. I spent 2 hours carefully drawing that on CAD and they still are slightly off. Not enough to really matter though.