Pleased with the first (very) short test with the raw_rec module. 1280 x 560 footage at 12 fps, edited in camera raw, and upscaled to 1080p then twixtored in AE. My card only has a rubbishy 9 mbps write speed, this is all all possible at this moment in time :/
The panning was an in camera magic lantern function and the lens used was the kit at 18mm
A big thanks to all who contributed to magic lantern! Can't wait to see what my new card can do.