Grande yes, is fill and go. Make sure if you adjust the inner plug it is either attached to a battery, or the battery connection is pressed firmly against a flat surface.
Stone: Make absolutely dead certain the wick slits are lined up with the wicks. Also, make sure the bottom is firmly screwed on. The are kind of hand assembled with not as much care to detail BECAUSE they are designed for changeability, if that makes
sense. So don't fill it before checking the bottom cap. Also, when you screw on the top cap make sure the wick slits stay lined up with the wicks. You may need to lubricate the top cap and the seal before screwing to make sure it doesn't shift too much.
And read the stone
thread. The whole stone
thread, lol.