What size washers do i need? I'm thinking about buying a Fractal Design Define XL R2 case. One of the big complaints with this case is I guess sometimes they ship with standoffs that are to short? So when I order it I figure I'll want some washers just in case but don't know what the inside diameter needs to be and don't have a caliper anymore that I could measure the threads with. Even if I don't need the washers this wouldn't be a bad thing to know anyway.