I used the front arms for the rear with the stock rear hub and found the rear turning a little better without getting oversteer. As the T4'15 is my first non-AE tc since starting into the hobby with the TC5, I was surprised how much steering it has. Something I always missed with my Asso tcs and ended in "unnatural" setups like 1* toe-in and/or 20000cst diff oil in the rear...
I would really like to try the RSD7, but went for the T4 to join the wrenching fun with my Xray-driving friends after holding up the AE onroad flag almost alone for the last five years.
Unfortunately we don't have the timing system installed at our track yet, to see if my 6.2 is faster than the T4