I have reached the level in my driving that i can advance to semi slicks. At the moment i am only trying to shave more seconds off my sepang track time. The AD07 has helped me shave off many seconds from my previous street tires. I will be very dissapointed to end up getting a tire that does not meet the standards of AD07. Basically if you read from the beginning of this thread, i only want one piece of AD07 because of my defective one which i have sent for claim 5 months ago but they have no stock to return me a new one. So i have now decided to just ditch the other 3 tires and upgrade to semi slicks. I choose toyo because they are the most affordable semi slicks in the market other than Silverstones which dont make 16". I aint no pussy, road noise does not bother me, as long as i can clock one of the fastest times in my class. Gesto, i would like to know if you have tried a performance street tyre and a ultra high performance tire on the track. On the street, any tire will suffice, but on the track its very critical. An ultra high performance tire(like AD07) can shave off many seconds. Please note that when i say purist, i am refering to me, not a stupid movie.