Travis

I am in a club championship that started in early June. I was in a flight of 8 people that ranges from 10.9-11.7 indexes. The first round was in June, the second round in late July and the semi finals in mid-September. The finals are this Sunday.The person I am playing improved his index from an 11 to a 6 since June and I am still an 11.2. Do you think the finals should be played off of his new Handicap or what was used in June when we were flighted?