Ok so I thought I remembered reading a while back where someone hacked a Beta backup to use to restore to the latest public version of iOS. Something like changing the identifier or something? Anyone remember this?
I tried to hack the .plist and iTunes told me the backup was corrupt. After I had restored to iOS 7. However the other method worked as I did an opt. Click update to 7.1.2 from 8.0 beta 2. I was kind of surprised it had worked