Has any one tried them as yet. They have only just become available in Europe and there is no one usinpg them as yet over here.

I have not tried the slalom fins yet but have used the assy speed fins quite a few sessions, starting at the Luderitz canal last year.
I am very impressed with them! They have the same type of characteristics as the legendary older KA assy speed fins but feel even faster. They are very secure and forgiving. They have gret resistance to spin out under even the most challenging conditions. They are also very resistant to spin out going upwind on the 'wrong' tack and will recover easily from a spin out on the 'wrong' tack which is a problem with many assy fins.
On the speed run you can load them up way beyond what you would expect from such a small fin and they will keep giving more speed under high loading.
I have used the 18cm and 16.5cm sizes in my CA40 with 5.4m, 5.0m and 4.6m KA Koncepts. I set PB's at Luderitz with the 16.5cm and 5.0m sail, and did my second best all time average for Sandy Point in January this year with the same fin and 5.4m sail in 35 knot winds, waaay less wind than my best session there. I have been using the 18cm fin a lot less ideal in 25-30 knots sessions since then and consistently been getting great speeds.
I have a selection of other very good speed fins to choose from and test against and can say without doubt that these new tribal speed fins are currently my favourites. I also think they will have plenty of rake for the Lake George weed and I can't wait out to test this!

I was with Slowy at the Creery Lagoon in Mandurah a few months ago when he did 46kts on one, the conditions at the time were way beyond my ability. High gusty wind and not dead flat water. Slowy looked in complete control, as sailquick says, he had no trouble getting back upwind either.

www.gpsteamchallenge.com.au/sailor_session/show?date=2014-07-07&team=10

I'm in the market for some new sym speed fins and was decided between the Gasoils and and the clockwood. But now with Andrew's positive review...I'm having a tough time decided!

Whats the advice for Assy's and small slalom boards?

My fave board is my Tabou Manta 54 (74 Litres, 54cm wide), I've had it up to 39kts on 3 or 4 occassions, never seem to be able to crack the 40kts, yes I know the pathetic sailor doesnt help, and I probably always use size smaller than would be ideal for sailing fast. Firstly would an assy fin grab me that extra knt I'm looking for? Then which size would be ideal the 23cm assy, or the 21cm assy.

Yes I have a Nude 46, which I have done 40kts on many times, but that board is small and twitchy, and with me recovering from a badly broken leg I want to minimize my risks of breaking bones, so am thinking to give the board a miss for a year I think. Medical advice is 6 months after surgery I should be safe to resume windsurfing, given a successful rehab. So I'm looking at Jan 2015, and would like to be at Lake Goerge, and will probably only bring my Manta 54 (Car on train).

Any adice would be helpful, I'm so fn bored

I have the Manta 54 myself and this board is easily capable of 40+ knots. In fact it is one of the easiest boards to go fast on.

There's just 1 problem for speedsurfing (easily solved though) - the front footstraps are in the wrong place.
You need to put an extra set of plugs 3 cm backwards. Myself and all dutch speeders who (used to) have the Manta 54 have done this.