I have mixed feelings about the 3d printed panels. I mean, the idea is amazing, but you would probably have to use some very expensive printer and materials to get smooth, non-porous surface, or finish it with some additional polishing and coating. I'd much rather have Cooler Master offer some different injection-molded panels.
Regarding weight, CM website states 98/99g for the mouse without cable. Maybe it's lower than stated by KitGuru because they detached the cable completely? Gotta wait for some better reviews.