10's max, Its usually the first disk that changes a lot, the other disks in a game may vary, depending on dump quality or even some strange dump software (i came across someone with some overdumped 901120 disks) no idea how they managed that, but it does happen. Also, some things will modify the sector data slightly, even tho this is program/user transparent, it will affect detection. Again, no clue as to what software would do that, or would even want to bother doing that < probaby shoddy or lowlevel coding which is quite unnecessary for unprotected disks, as the trackdisk.device works fine.
