Did they do this while knife fighting? IMO, then they are either using Combat trim or thier plane wa badly our of trim. I've grabbed an F6F more this tour with the aquatic nature of the terrain and I find if I am very trim conscious I do not get that spin any more. Not saying it's still right but it can be dealt with if one tends to the chores and doesn't expect the F6F to be a yank&bank fighter. I can turn fight with that F6F better than most planes I've flown to date *IF* I mind the trim. (which I've always done manually. no CT here)
-Westy