Thank you for your explanation. Actually I personally prefer ACFL models over Sim Dream, especially Ferrari model, on SIM Dream the sidepods are too narrow and "shark" on sidepods is more accurate, with the new skins from reacedepartment also final color is much closer to real life. I also compared the W13 and the red bull and both look identical. So as 3d model I prefer ACFL. Now since the RSS evo physics looks better I injected ACFL with RSS EVO X 2022 physics, some people say that F1 2021 physics seems more accurate,on this I don't know as 2022 cars are different from 2021 so I don't know why people make such statement. I also Imported car sounds from Sim Dream for Ferrari from the latest 1.200 version which has the new engine sound from Ferrari. The downside of using RSS physics is indeed top speed, and this results in the impossibility to replicate real life pole times. I then tried to import the power.lut from sim dream to ACFL with RSS physics but this resulted in even lower speeds and don't know why. Very frustrating. Is there any other parameter that affects car performance rather than just the power.lut file? Would you then recommend to use Original ACFL physics? I noticed as well that sim Dream cars do not turn properly so as you said that is not ideal and also cars have mich more grip and don't know how really accurate is this compared to real cars.