There will never be a perfect image for a bunch of reasons. Getting every file in place for a fresh image is easy. Getting every file in place with proper permissions is easy. Getting every file of each package repacked properly is not. If it were easier to repack all the packages for the base system files, it would be much easier. I do have a few ideas though that may correct this, but just have had little time to do them. Once 10.5.3 is released I will likely release one last DVD that should "hopefully" be as good as possible, but only time will tell.