So I bought this tool to prevent damaging my Macbook Pro when I change my RAM, HDD and optical bay with an HDD. http://www.amazon.com/gp/product/B000TA56MI/ref=oh_details_o02_s00_i00 So how do you properly use this tool? I read that you have to plug the alligator tip to the ground prong of your electrical outlet. Is that true? Is this worth it?