This is try10h-opt2 which is an all-helix model that was the highest scoring undertaker model (just slightly better than model 1), but which has a hole in the middle so is not assumed to be our best submission. It was created by using these all-helix server models as a seed without any sheet constraints: PROTINFO_AB_TS1, PROTINFO_AB_TS5. Further polishing was done using the undertaker techniques to reduce breaks and clashes.