Slalom fins. How big is a difference?
I now have the iSonic 110 and I am starting to get well into slalom again.
As I have mainly been freestyling and wavesailing the fifteen last years I know lots about such equipment, but not so much about slalom equipment.
Having several fins for a slalom board, how much bigger makes a difference in lift, earlier planing and going through lulls? Lets say I have a z-fins 38 for my iSonic 110. If I want a bigger fin as well how much bigger must it be to make a difference? Is a 40cm bigger or will I have to go to 42 or 44?