What manuals do/don't fit in UGC's again?
I think SNES and N64 are the limit or are even just too big (same size as Wii and Xbox 360).
Hmmmmmmm. That seems like a pretty neat idea.
Although for NES manuals I don't really see the point cause they fit in UGCs perfectly.
For me that would be awesome for the bigger-than-possible-to-fit manuals stuff.
There are 2 reasons why I decided to store manuals like this.
1. As I do play my games storing the manuals like this prevents scratches.
2. I am serious collector and have multiple copies of the manuals - different region / language, see:

BTW: as you should know i don't use UGC's but double wide DVD cases, so SNES and N64 manuals are no problem.