I have a nice 1440p VP2770 32bit color Viewsonic LED monitor and it was factory calibrated before shipment (it is about 3ish years old now) When I go through windows calibration I don't know how to properly do the color part and the sharpness is confusing as well I don't know if I am doing good or bad. I want it to be at it's best and I am assuming that it's color has changed over the time I have had it. Is it worth it for me to calibrate and is the windows standalone calibration tool the best free software to do this in windows 10? Also, how much of a difference would you guess I would be likely to see if I purchased hardware (like a spyder) to do it?