Circle one 6'11"

Hi all,
Just got a circle one 6'11'' single fin egg.
Whats the difference between putting the fin fully forward, in the middle or fully back?
Also, are these board FCS compatible, and would you use a longboard fin on this type of Board?
Cheers
SA
Just got a circle one 6'11'' single fin egg.
Whats the difference between putting the fin fully forward, in the middle or fully back?
Also, are these board FCS compatible, and would you use a longboard fin on this type of Board?
Cheers
SA