Run the S for the first time tonight and I must say I am very impressed. I had kit tyres on it and it handled really well. After downgrading from and Xray T3 I was unsure at first.
The only thing I will be replacing will be the shocks, as I have rebuilt 3 now due to leaking issues(even with green slime used when building them). I have also ordered a 19t centre pully to allow me to take a little tension off the belt.
Apart from that I thing it is just flexible enough for my local track this time of year.