My lightning affected 2A decoder has these nasty screws on the outside, there's this little bump in the middle that prevents an Allen key from sitting flush. I was forced to resort to caveman tactics but at least I only had one screw to deal with.
Curiously though, the screws on the HDD tray don't have that same bump. The HDD is in good shape according to Hard Disk Sentinel. Ironically enough, it will be the new base of operation for my high seas endeavours.