I spent all weekend testing the 13.5 and 17.5 in 12th and the 17.5 in wgt-r. Ran them back to back with the TSR and they are excellent. Fast laps all were on par with the TSR and the fade seemed to be a little bit less. In 13.5 I actually got .1 faster hot lap than with the TSR so that is encouraging.
Big thanks to Paul for getting a good product that will allow us to compete!