completely forgot to update this... so if anyone is interested:
I ran the tires for a day or so prior to Snetterton to get them scrubbed in, I decided against shaving them as the forecast was not particularly good so I figured I would probably be needing the tread depth.
I haven't used any other brand of track oriented tires, so I can only realistically make a comparison to the road tires I have used in the past - Pirelli P-Neros, Michelin PE2s & good old Toyo TR1s.
The first major difference was the ride & turn in, the rock solid sidewalls made the bumps in the road very noticeable but this translated into a more "involved" feeling through the steering. The turn into a bend was amazing; sharp, stable and non of delayed turn road tires can give. The mid bend stability, especially when you feed the power in towards the exit was also fantastic, very little power induced understeer just massive grip!
Obviously the dry traction was absurd, although I will say for someone that is still very much a beginner on the track the don't have the gradual loose of grip the road tires provide, its more of a grip, grip, grip, nothing if that makes sense so you have to be awake when pushing them as you don't get the gradual warning the road tire can give IMO.
I started the day in the dry with 30psi all round cold, couple of warm up laps and the fronts were pushing 36, so bled them back to 28 front, 26 rear. Being the soft compound they warmed up very quickly, so kept bleeding them until they were stable pressure wise. It soon became apparent that the dry and hot conditions in the morning were not ideal for them endurance wise, there was a lot of pattern-edge melting and I could feel them quickly overheating and by the end of the lap understeer was becoming more and more apparent, by this point I was wondering If I should have taken Steve's advice on the shaving
Luckily the day ended up being one of those unpredictable downpour/sun/downpour/sun days, so I got to test the tires in nearly every condition including standing water! :S
As the track temp cooled due to the rain the tires came to life as the super soft compound kept its heat so well, they were steaming in between laps and nearly bone dry after 10mins in the pit garage!
Come lunch time I took the tires off the car to examine them and it soon became apparent that more camber was needed. The car had been rolling a little more through the turns with the Kuhmos, probably due to the increased traction, as a result I had stiffened the shocks, but they still the where wearing unevenly to the outside. This done they seemed to be more stable heatwise, especially in the dry with much less overheating going on.
As expected the standing water was a bit sketchty; complete loss of steering/traction in the puddles, but surprisingly on the shiny wet track with no standing water there was still grip by the bucket loads.
The last thing that I was impressed with was the wear rate. The only come with about 6mm total tread & 4mm from the depth markers from the factory, so I expected the front set to do a day and maybe some road miles before calling it quits, however the wear was excellent, even on the fronts and I will get another couple of track days out of them yet, the probably lost within the region of 1-2mm which for such a soft compound I was more than happy with.
