After replacing the HDD with an SSD, I found that one of the front locating screws didn’t fit back in (no corresponding screw hole on the new drive caddy). I also found it hard to fit the antenna plate back in the slot, but found that removing one of the rubber “feet” (where there was no longer a corresponding screw hole on the disk) helped a lot, as did gently folding back the edge of the antenna plate. Refitting this was definitely the hardest part of the process - excellent instructions!