My G603 weight rudduction with no visible effect on the outer shell ~79g : r/MouseReview
Amazon.com: Logitech G603 Lightspeed Wireless Gaming Mouse, Hero Sensor, 12000 DPI, Lightweight, 6 Programmable Buttons, 500h Battery Life, On-Board Memory, PC/Mac - Black : Video Games
Logitech G603 Wireless Gaming Mouse Review - IGN
Logitech G603 LIGHTSPEED Review - RTINGS.com
G603 weight reduction project (with pictures and instructions) : r/MouseReview
Logitech G603 Lightspeed Wireless – iGamerWorld
Nerdy Tech Expert - Use this simple, easy and cheap mod to reduce weight of Logitech G603 Lightspeed Wireless Gaming Mouse. https://youtu.be/X4ch-v7j8bg | Facebook