i always leave my sunroof popped up, even when its raining, and i always have. i've seen the rain hit the inside a little where that black hard layer is under the "roof" part, but i've never had any problems with water getting in my car or any leaks of any sort, so i've basically always just kept it up for months. does the water drain out on the sides on somewhere at all, because surely it would add up over time during downpours?
i know i realllly should put it down, but really, it looks pretty badass up