I now have my Kumho Ecsta XS 225/45R17 ‘s installed and used them on my first AutoX at a local club. Lots of grip, once they heated up and burned off the release agents (I did not shave the tires). I haven’t really pushed them yet, and I’m still playing with air pressures a little - I am used to running high pressures (~43lb) on my Nitto’s, whereas the Kumho’s seem to prefer a more reasonable pressure.
…and one step back. I blew one of my rear shocks - not racing, but on the road. Guess I had my ride height set a little too low. So for now she’s a little bouncy.