Unfortunately it doesn't work for me because the mouse cursor gets to the edge of the screen and the measuring stops.
I was using some other program that kept measuring and was ignoring that the edge of the display was already reached
When the manufacturer says the mouse operates at 1800 DPS it's not a real value. You have to use your own tools to measure that.
For example my mx518 when set to 1800 in reality is ~1875
And g305 set to 1800 in reality is ~1 846
Too bad i lost a tool to measure that.