There are already 3 centuries today that aren't accounted for in the spreadsheet, so only 2 options remain - 46-60 or over 61.
At the beginning of the tournament I told Trofo that I feel the question was a mistake and that 61+ is a certainty based on the number of frames that will be played, but it appears that he was on point with the margins.

Generally, I feel quite confident of getting the top prize here. Was a really consistent performance, with only one bad tournament (previous one).