Is their a script or process completely reset all file system file permissions to factory default? (Less restoring from a image backup or reinstalling the OS).

This would include I've affected all files from / to Applications and home folder and all contents. (Everything)

I've tried to use the Disk Utility's First Aid 'Repair Disk Permissions' but it didn't seem to touch or affect everything - some but not all. I've ran it twice so far...

I've seen this but it's not quite the something. Fixing mac user file permissions, not the system

The reason for all of this is I accidentally ran a chmod on all files (as sudo). Working too fast, now I'm in a hole.