ok someone gave me this moderately crapy glass pipe a while black, but i discovered it actually hits pretty well, the only problem is, it has a larger then average hole on the bottom of the bowl... now i have an extra screen, but i know it can break the pipe, but otherwise the pipe is useless anyway, so i figured ill put the screen in their and if it breaks at least it had some use instead of none... is their any other reason why i shouldnt use a screen?