Commenting to confirm, this repair can be done. Be careful around the ribbon cable step, don't tug the two halves, try to ease it off. My cable came loose, but the cable lock was intact, so I was safe to reconnect the cable. When putting the two halves back together, it takes more pressure than I was comfortable using to get the last pin. Start with the weird 'U' section of the mouse, then work your way around the back and thumb-side of the mouse. The final pin for me was the front underneath the left/right click at the front of the mouse. If you are certain it's the last pin, put pressure to close the mouse. My mouse is fine, I hope yours will be too. You're experience may vary. Oh and the provided screwdriver was able to reach the recessed screw with a few millimeters to spare. They provided a long Philips bit. You're average Philips bit, will not reach. They provided a 1.125 inch bit or in metric, around 2.857 cm. 'Bit' doesn't include or account for the shape of screwdriver or the screwdriver's insert.