What size is the Zalman - 5.25" or 3.5"? I have the Vantec 3.5" controller in my P180, and the problem isn't with the buttons but with the cramped quarters of the 3.5" bay. The only way I could connect everything was to leave the wires long enough I could fit them through the front of the case, then I connected them to the controller and slid it into place and gathered up the extra wires. It works, but it was a real pain. If you can spare the bay, I would definitely recommend going with a 5.25" controller.