After 10 minutes on the water the wind dicerction changed, so I decided to expend the day testing.

First I compared my "new" isonic 70 in front of my ol isonic w49. Both are fast buy the first one is easier to manage in choppy waters. My spot usually is choppy...

Then I tried some fins on the isonic 70:

Gasoil CHL 27 cm was fine and realy fast but maybe a little big for today conditions.

MXR ufo speed 30% 24cm: also was fast but with less acceleration than gasoils fins.

Gasoil (I don't know exactly the model) 25 cm: also was fast but it felt betten in the flat water tram. Could be a great combienation with this board, 5m and flat water.

Today was my first day with extre weight (5kg) I felt good with it. I could wear more :)