So I just got the G600 in the mail and i'm fiddling around with it and trying to get used to it (first time using an "mmo" mouse) anyone I so far like the alternate setup the most (the side buttons are assigned to the num pad) but it won't let me use shift modifiers effectively. Currently instead of showing as Shift-Numpad 1 or whatever other numpad button it's showing up as a seemingly random keybinding. For example shift G9 = end button and shift G13 doesn't exist at all. I can't really figure out how to get it to work
they are default windows keybindings. shift + numpad 1 is end through windows, thus it can't be keybound properly. try setting the mouse to use F1, F2, F3 on their own and with shift (remove wow bindings using the F keys) or use alt or ctrl bindings.