kombat 107

[kalvo]

hi All,
i normaly use the formula 160 in my home spot with a 11 m.
for the sea and for another spot i use carve 122 , but i m looking for kombatt107 d ram.
my weight is 80 kg and my sails are 5 - 5,8 and 7.5.
my question are :
i can really use k107 with a 7,5 ? fin ? the 30 cm incluse with the board or i have to by a 34 freeride fin ?
how my knotes i need to star planig with my 7.5 ?
thank you, bye.
matteo