 We've spoken at previous rounds about the Kumo combinations, you get 16 per round, how do you use those, different wits, compounds, etc. Another thing that you're factoring, you don't just bolt them on and leave them on, Eli Evans here just finished one of the stages here in Queens then going into another. Eli you're checking some pressures, pretty important part of the job for the driver and the coder, once you're out in the field. Yeah it is, it's really hot. We've just finished the stage now, we've had 500m transport and then we sit here for 10 minutes. And just in the 2 minutes we've sat here, my tyres have gone down 2 psi just with them cooling down. So tyre pressure is there everything. If your tyre pressure is too high, your tyre doesn't move around as much and you feel like you're getting less grip and you feel like the car is not in the road. You bring them down a little bit, all of a sudden suspension, everything works better and the car is in the road and it gives you confidence. But of course not too low because they can cause an issue in regards to punches and also it's a bit of a guarded secret between drivers on exactly what you find as an optimum temperature isn't it? Yeah and look at varies between cars as well. Like if I was running a four wheel drive turbocharged car I might be a couple of psi higher but in this little Citroen DS3 which weighs 1150 it's a couple of hundred kilos lighter so we run the tyre pressure a little bit lower, generate a little bit more heat and get a bit more out of them. It's not just about driving and co-driving is it? No there's a bit of an art to it and tyre pressure is one of the only things touching the road so it's pretty important.