I had nothing but trouble trying to get my rs turbo to start and run right on cosworth management. I sold it all in the end and putting it all back to standard mfi. If i wanted cossie management i should have done the right thing first time round- sold my rst and bought a descent priced saph.

Other than that mate, get aftermarket management, im not gonna quote any names as everyone has different opinions on different packages/makes, but at least your getting a brand new package with brand new loom etc etc.