I don't have a SiD, but I do have a vamo.. somewhere along the same class of battery. One thing I've recently learned, is that most VV/VW batteries are good for single coil only (at least my vamo is). I tried creating a 1.2-1.4 ohm dual coil setup, and it failed miserably. The coil setup was good, it was just, the Vamo/battery setup I was using just couldn't put out enough power to run a good dual coil setup. Single coil, it works great, and it's the perfect item for me... but every once in a while, I would like to cloud it up, so I have my first mechanical mods in the mail as we speak.. now all I need is a high output battery and my dual coil dreams will be a reality.