so i got a custom ipsw from alitek12 on reddit for an iPad 3,1 6.1.3. I have the correct blobs but i'm not doing something right. every time i try to extract the pwned iBSS, it says it can't unzip the file. Also, does there need to be a bundle to restore back to 6.1.3? i'm on 8.4 jailbroken right now. any help is appreciated, thanks