I was tired of the red LED in my Logitech optical mouse, drugs so I changed it. It took me less than 10 minutes (including searching my house for an LED).
I also slightly bent the spring in the scroll wheel so it scrolls much smoothly and quietly.
By the way, I noticed a better performance of the mouse on surfaces where it failed to work properly in the past… weird, but cool.
LED Specs (for the curious):
Emitted Colour : OCEAN BLUE
Forward Voltage : 3.2 V ~ 3.8 V
Luminous Intensity: 6000 mcd
Max Continuous Forward Current : 30mA