Ran the modified top deck on carpet today (first time with it on carpet) using Sorex 28jb's.
Best the car ever felt on carpet and the sustained grip on direction change was amazing. So much confidence with the car now and I could push easily with it.. might even put off purchasing a 2012 now (Shhh). and importantly, no grip roll or understeer... just confidence, rear grip and improved lap times.
so to me, I think its better outside and inside, but thats me