@elbee You’re right! I don’t need perfect track, also I’m just poor runner. The reason why I’m trying to figure this out is, that this function was somehow claimed, I tried that and it doesn’t worked as it should. That’s all. If I get answer, that this is only for Run model or 400m track, I’ll be perfectly fine with that. But it seems it isn’t, so maybe I’ll help to improve future fw with sending my logs.