And here is the end result. From the front it is almost like new. I just had to re-glue the cover on two of the corners. The back is now yellowed but that doesn't bother me and the left side looks the worst. I think I'll get a repro module so I can swap the back and Super Mario All-stars can shine in new splendor again.
The greatest remake of all time? 👌 I Remeber as a kid my neighbour having a SNES and Super Mario Allstars which we played constantly! It was so damn good!