I used gigedit to change the pitch bend range in the instruments at maestro_concert_grand_v2.gig and hit the "save" button. It took about three hours. Besides the GUI froze. While it should be possible to design a more intelligent save method that tried to optimize disk writes, it would probably be much, much easier and almost equally effective at a first moment to implement multifile gig write support for working with really big gigs. A nice extra when time and motivation permits would be some progress callback from the save methods, but let's get the editor(s) rolling first.
*** This bug has been marked as a duplicate of 90 ***