I also tried Zady5 mod, and it helps, like Morelius mentioned it's not 100 percent, but I've been driving for a week or so (+-1000km) and even my girl noticed a difference. My s2 is more pleasant to drive, and smoother in those fast corners. It will do for now.
Also, it does have 02 sensor.
https://www.998cc.org/threads/zady5-throttle-snatch-method.21486/
read this thread, but basically adding some diodes and resistors across tps sensor, moving tps signal up in rpm, so fuel cut would happen later (I think)? As people pointed it helps (kinda) but really not a whole lot. And from my...