I attached a 510 extender to my kGo and then popped on a Stardust just to see how much it'd change the draw. Well, the draw is a lot lighter and airy now, which isn't necessarily bad, but I think I preferred it more without the extender. Plus, it does not look as good, since there's a gap between the battery and Stardust now with the extender. Sooo.. when i tried to remove the extender, I realize it's screwed into the inside of the Stardust thread, and I can't seem to remove them. Grr... so I kind of just wasted an extender and this Stardust will always be attached to it. I tried using some pliers but they aren't small enough to fit and all I ended up doing was pulling out the little metal rod inside the extender.