Hi - Just picked up a 16V box from ebay

really should know better but
done it now. Was hoping this one was better than the one I pulled off but...
Noticed some play if you grab the flanges there's some slight up and down and side to side play.
Is this something I can live with or should it be looked at is my question?
If I need to fix it, how simple is this job, can it be done without a full strip down?
Cheers