My new SP4 keyboard was just arrived. It looks to be a fantastic improvement over the SP3 version. However, it will not stay magnetically attached to my SP3 in the docking station. The picture below shows the SP4 (teal) cover attached in my docking station. The SP3 (black) cover is on top, showing what appears to be the issue. The magnet is a little more toward the top edge and slightly wider in the SP4 version. You can start docking the device with the keyboard properly snapped to the device. But once you finish closing the docking station sides, the keyboard will pop off. The second photo shows that magnet does not fit above the docking station lip, thus cannot stay attached. I don't see how this can possibly be modified to work.