Mate that ecu your intrested in I would leave alone. Keep your AGU ecu get everything fitted buy a relentless V2 manifold (I think theres a V3 now) With a K04, relentless mani, saab red injectors, good fmic, atleast 2.5 turbo back exhuast, inline fuel pump and 3 inch badger 5 tip your looking 300bhp custom map with R-tech. Then consider a Forge actuator to hold on to the boost, Forge 007p and sort the sh!t breather system out with a catch can.
It is aimed at you mate I shouldve drove up to Durham and bought your old car Wouldve been better off, cost me a fortune back and fore to Nick haha