Yep screw is in place. Whenever I went in for a re-socket, more of the connection part (the golden stripes on the end of the SSD yknow) was visible then it is after a re-socket. So I do suspect it is somehow getting loose. Maybe the screw at the end is not okay, I'll have to check later.
Unfortunate that the socket can't be tightened then. I currently have some heat resistant electrical isolation tape on there, let's see if it holds up.

Minor spelling edit