By default mouse acceleration is on and its awful. This guide will show you how you can disable mouse acceleration in Gundam Evolution.
Further to this it would help to disable mouse acceleration in windows under Mouse Properties: Pointer Options> Enhanced pointer precision – turn this off.
Having mouse acceleration off gives you true muscle memory reflexes and will improve your experience.
Find the file: input.ini
Add this to it:
If you don’t disable smoothing you would need to use a polling rate of 250 Hz or lower otherwise the game is very weird feel.