I need some hardware advice. I'm looking for something to blend into a business environment. I have stick batteries, an eroll and multiple evods and egos. As they say " I need more horsepower". What are some small mods that aren't incredibly heavy? It needs to carried in a dress shirt pocket with a pen cap style cover or at least something to cover the exposed mouthpiece. Blending in is the key to this working. Carrying something in the pocket of my dress pants isn't an option. Please let me know if you have any ideas.