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Get a humidifier, it's an anti static mat for everything, lol. That's all I use. Great project though, and your conductive layer should be on the bottom not the top. It's job is to provide ground potential base for your insulating layer, which is not a perfect insulator as nitrile rubber is 625M ohms per 1/4" length (better conductor than wood). you don't want a highly conductive top layer to short out your work on. And an esd mat does nothing if you don't ground yourself first, or just get a Humidifier if it's at home or a small lab. Cheers