Yeah, the FM1 application was a pain in the butt to complete and the early deadline caught me off guard as well. I had to write a whole new personal statement, reformat my significant research experiences, and create a biosketch (NIH version of a CV), all of which had to adhere to the super super specific to NIH formatting guidelines otherwise your grant application will be rejected. While it was daunting to do (without much guidance as well!) and is quite time intensive, I do think it gives you good practice for writing F30/31s in the future (this is more of a note for future applicants who may be interested in the OxCam program). The FM1 grant submission is new for this year, it's unfortunate that you did miss that earlier deadline :'(