just an FYI, the box does not fit Fantasy Flight Sleeves (the best sleeves IMO). Just wanted to note that for people just using this box for storage. FFG is known to have a bit extra mm on the top half, which I like, but does cause problems with almost all products promoted as "fits sleeves".
Are you referring to the purple FFG clear sleeves?
I think I might be ok. I sleeved everything in FFG purple and trimmed the tops off of all of them so they could fit inside the wells from the first edition master set insert.