I have created a table of all of the fins that I have used in my slalom boards over the past few years, and scored each one out of 10
My criteria is based on feel, speed, lack of spin out and control. It is very subjective, and really based on my opinion. One think that I have discovered is that a fin which is great in one board is a dog in another.

The most disappointing fin I ever had was a Deboichet SL4 40cm (probably as I had such high expectations)

^^ Top stuff, lots of experience!

BTW is the 2015 iSonic 107 pretty loose?

I'll let you know after the weekend, First round of the British Slalom Series.... on a board I have not sailed yet

Nice table thanks. Good see your board changes over the years as well.

It would appear that I have been keeping SB going single handedly

What sort of water state do you sail in?

Select to expand quote

sboardcrazy said..
What sort of water state do you sail in?

Cold!

Select to expand quote

sausage said..

sboardcrazy said..
What sort of water state do you sail in?

Cold!

Cold, but shark free

Typically sail in flat water for speed sailing (when conditions, tide and wind direction all come together), however, normally short shop or open sea with small waves. Most difficult conditions I find is 20cm to 40cm wind blown chop as this really throws the board around on the gybes

Select to expand quote

Mark _australia said..
^^ Top stuff, lots of experience!

BTW is the 2015 iSonic 107 pretty loose?

Funny !

I have sailed the 2015 is107 twice, using 8.6. Initial impression is excellent, easy to gybe, and carries the 8.6 really well. Gibing exit speed with the 8.6 was high, really easy to keep board planing. It felt better balanced with 8.6 than my 2013 Is110, which was a surprise.

I only tried with a 40cm Sonntag SL-P which felt nice, no spin out issues (with the IS110 I used the 43cm SL-P), however with 8.6 it did not point upwind well.

it felt quick but not "amazing", it is such an easy, controllable board that it may actually be faster than it feels. Also an 8.6m is probably not the fastest combination

so far very happy with board