Basically what the title says-anyone have any ideas on if a wavemaster could be kept outside? I've been wanting to get one for a while but my apartment does not have enough space for it-the backyard, however, does. My plan is to cover it with a tarp in the rain/snow, but not sure what type of damage would be done to it by the elements. Also any idea if filling a base with water would be an issue? I can fill it with sand if I need to, but I'd prefer water.