The double clicking problem on my Razer could be temporarily fixed by taking it apart and cleaning the actual buttons under the outer shell every couple months, at least for my Death Adder. In doing this there was a ribbon cord that was soldered to the pcb that would flex every time the mouse got assembled/disassembled and eventually broke off. I probably could have fixed that too, the soldering looked super easy, I was just sick of the thing by that point. Worth considering at least if you don't have a spare mouse or are waiting for a new one and don't care about the Naga and want a quick fix.
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