Hey guys - I'm James' mate with the Venturi. Standard fins were all 37.5 with a bit of cant on the front ones. Very easy to ride but just not enough to get the board to unstick & go upwind properly. TBH naish should either supply some bigger fins with this board or make it cheaper & let the rider choose.
Have got the 2011 north fins (talons) now. 42 front 38 rear, 0 cant. Makes a HUGE difference. The board gets going earlier & points way higher upwind on the GPS, putting it back in contention for racing. Doesn't seem any harder to ride off the wind either. Proof will be when we go out & race next time
The front fins (as James says) are placed further aft on the venturi than most boards. I think this makes the off wind handling a bit easier than most, ie reaching at speed is very comfortable. Downside is it feels like it takes more 'effort' to push it hard upwind, where as the Temavento just naturally points up as soon as you're moving, almost!
My only other comment on the Naish is about the weight. I don't know how re-enforced its supposed to be... but they should seriously ditch the 'teak decking' & build the thing with carbon. Its meant for racing, not looking at.