They take about 30 seconds to put in, if you take your time. When they're installed correctly, you'll have an area of the RF board that extends beyond the mainboard. That's 100% normal. Unplug the power to the controller, remove the three screws in the back, properly orient the RF board and firmly push it into place, put the back on, install the three screws, push the control button back on (it'll come off, that's also 100% normal), plug the power back in, and the W will be lit up. At that point, EcoSmart and your ReefLink will find it. Just make sure you have a handy little place to put the screws so they don't roll all over your desk or onto the floor or whatever. No need to crank down on the screws either - you're just keeping the back on, not trying to make it air-tight. :)