Hmm Id would like to add one more suggestion. 600d has no level and I know its not possible to add a level feature but, if I manually level the camera with a hotshoe bubble level would it be possible to place a line in the center of the live view screen that could calculate how many degrees you pan upwards from that line, or would it need an altimeter? Not sure if possible but this would all tie together for creating gigapixel panos. Regardless I'm sure there is some way that magic lantern in some way shape or for could speed up and make manual gigapixel panos more efficient out in the field. My suggestion is to try for yourself and maybe come up with more recommendations.