I believe it came from the G404 thread sourcing Logitech China.I honestly haven't given their suggested grip much of a chance. It just feels so odd placing my ring finger on a corner since my natural inclination is to place ring and pinky along the sloped surface. Although I'm a sick bastard that likes the G303 shape, so there's that.
After almost 2 years of use my G303 has begun to double click on the left click. Though certainly didn't last as long as the G400.
Fortunately happened just a couple weeks from when my warranty would have expired. Lets see if Logitech is okay with a de-braided cable.