No stress:). The ECU can be mapped yes. Its on the forum somewhere how much u can have with the original ECU. Dont need standalone even thoug it has it advantages. If you get an lsd, the grip will get better, but the gearbox will get more beating . . . . . . I get some torque steer, but when its boosting youre going to keep both hands on the weel anyway and then its no problem;). I think you get a quite amount of torque steer with lsd also, but dont know. . . . . .