I'd also gone through and fixed some of the the broken doors around the place, which will still be broken in the backup.
I found the Griffindor sword last night too
Lots of cool stuff to explore. I think we definitely need to have another look at this map when he updates it to add all the new stuff!
I can't remember where Harry finds the Philosopher's stone, but I found the mirror room (at least I think that's what it was - past the chess board floor?) There was a diamond and a flint in there though