I currently have an iphone 3gs 3.1.2 (new bootrom) with a tethered jailbreak (using blackra1n). I want to have an untethered jailbreak so i need to use spirit. So it says i have to restore first, which is where the concern comes in: Do i restore to 3.1.2 or to 3.1.3? Also, I don't understand what shsh blobs are. Yesterday i used AutoSHSH to save my shsh blobs because someone told me i should just incase i need them later. I wanted to make sure I do everything right because i can't live with a stock iphone until june. So what are the steps I need to take to rejailbreak using spirit?