Futura 133 + 9,0m2 sail = Which FIN?

[prpa]

Hi
I will get my new Futura 133 next week and I have 2 sails 7.5 & 9.0m2.
Originaly I will get FIN 48 which will be good for the 7.5 sail, but I expect
that for the 9.0 sail it will be better to have 54cm fin.

For example I check this with Sail Calculator software what will be ideal
FIN according to my sail 9.0 and my weight 95 kg (without wetsuit,...)
This 9.0m2 sail I use in marginal wind conditions, And I wont to have
good upwind capabilities, I suppose that my weight will influence a lot?

So I saw in the board description that it accepts fins up to 50cm! If I put
fin fin 54cm will this be OK?