We've actually talked about the Brewster substitute before. I was somewhat torn on which to use, but decided to take Kanttori's advice to use the FM-2. The Brewster the Finn's used was somewhat different (faster, better climbing, lighter) than the one used by the US. Thus, we (the CT staff) felt the difference in firepower between the F4F and FM2 would be more significant in this set up than the difference in flight performance. Balance wise, we felt it the better choice. Hope that explains it. Thanks.
Sabre
CT Staff