Sensitivity slider doesn't go low enough

[Camranbant]

Even at the lowest mouse sensitivity, mouse movement is still fast, not helped by the acceleration and deadzone. If the acceleration and deadzone can't be fixed, hopefully there is at least a way of raising or lowering the sensitivity further than the slider allows

[Lagahan]

Bumping this, have to drop from 3200DPI to 400DPI on minimum to approach what I'm used to.