The s2 does flex but not from front to rear,but from a twist type motion..ie grab the front and rear and it will flex a little.This is a design character and is what gives the rear end a bit xtra grip.
I loved my s2 and was the single biggest regret when i sold it,i had a centro and just could'nt get over the amount of flex the chassis gave,dont get me wrong it stuck like poo to a blanket but i feel was greatly compromised.
Dont forget the centro is based on the s2,Cant wait for the s2 evo
