I used to autocross an Elise with a first-rate suspension system. I had Hoosier A7 tires. There were days when all the tin-top car guys were spraying their tires to cool them. I couldn't get my Hoosiers to heat. Then I heard about the 052. These guys worked on the first run.
When I got back into Sevens, cars even lighter than the Elise, I figured it was an easy choice to do the 052 tires. Not sorry. They certainly will cycle out before they wear out.
The XU class is the ticket for streetable Sevens. About the only meaningful limit on the class is the 200 treadwear rule. Great, the tire I want to use anyway is 200 treadwear.
I'm not legal for XU with the Toyos on my CSR, so I expect to run Exhibition for whatever events I get that car to this season. Next season it is going to be XU on the Yoko 052.
Meanwhile, I have a fresh set of Yoko 052 205-50-15 on the Birkin I took to Evolution Phase 1 last Saturday and are working great on the 7" wheels.