What fin to choose

[larrychile]

Dear Friends

I live in Chile and always sale in a Lake called RAPEL, were winds usually between 12-17 knots, of course 13-14-15 is the most

I have a Carve 133 with the original FIN, I have a North sails 7.3 and 8.5 (usually I use the 8.5), I weight 95Kg, and always take me a lot a time to get planning, so I think a 52cm Fin could be better, what do you think?

Please try to help me, or I should get a bigger Board?

Thanks
Larry