I have a 3g with 3.1.2 firmware. According to the flowchart, in the sticky, i want to upgrade, to 4.0 and jb with redsnow. when plugged in itunes asks me if i want to upgrade to 4.1 I am assuming that i want to upgrade to 4.1, the downgrade to 4.0 in dfu mode. then jail break? Is 4.0 the best firmware to use, with a jb device? I would just like to ask first being the amount of information out there is tremendous, and easy to get lost in. Edit: I clarified's instructions mention using blacksnow. So i guess thats what i would go with.