Ive had enough of running buggy, battery hungry roms and would like to return my Nexus S to stock. The last time I was on stock was 2.3.6 I believe. If I flash via CWM to the official 4.0.3 in this thread: http://xdaforums.com/showthread.php?t=1445570 will I then be able receive OTA updates, ie to 4.1.2? (obviously Ill be rooted again, but im not fussed)