ok per gentile concessione di Mdk abbiamo (...ha) risolto il problema della mira scrausa con la tastiera:
Ingame Vsync on: Slow mouse-look speed, ok aiming-mode speed
Ingame Vsync off: Ok mouse-look speed, very slow aiming-mode speed
Ingame Vsync off, and driver control panel Vsync forced on: Ok mouse-look speed, ok aiming-mode speed