my friend did the steps as described and patched a tank and sold it to me. The crack was at the common area everyone's getting the cracks at, on the belt strap area on the passenger side. It failed after about 300 miles and 2 months of sitting with a full tank of gas. This was a year ago.
I'm doing the process again this week on a different tank with a crack in the exact same area, wish me luck. I'll report back when it's done, i'll try to post pictures too... We really need nissan to make new tanks for us.
Actually, found this really good video.
https://www.youtube.com/watch?v=V_KivatBR4E