Followed the guide and it worked perfectly. One thing to note: when replacing the hard drive which is 9.5mm thick with a newer SSD that is only 7mm thick, it's useful to use a cushion of some double sided foam tape on the top of the SSD. This prevents the SSD from angling down towards the rear of the mini (assuming you have the lugs placed back in the grommets in Step 17), which makes replacing the 2 6.6 mm T8 Torx screws in Step 8 easier since they screw into the bottom of the hard drive or SSD.