G603 weight reduction project (with pictures and instructions) : r/MouseReview
I Freakin' Love the Logitech G603 Wireless Gaming Mouse – Review Geek
Logitech G603 Lightspeed Wireless Gaming Mouse : Logitech G603/G613 wireless gaming mouse and keyboard review: Is it possible to game without wires? - HardwareZone.com.sg
Logitech G603 wireless gaming mouse review | Rock Paper Shotgun