My new girl had a little box hide ... it's too big ... I will be getting a new one ... my questions is .... it seems he just cut it with a saw or something and the edges are rough I have found one place on her that seems to be a damaged scale or 2 / maybe a scar... I am SURE it's from her side scraping that thing. So if I get a plastic box and cut a hole HOW can I make the edges so they are not rough and sharp??