Is there any way to test whether a model should print or not before you try to actually 3D print it? I feel like there is, but it is proving very difficult to search for this on the web. The program I have in mind would be sort of like a print preview, but for a 3D print. I don't have a 3D printer with me, I'm getting it printed somewhere else. I would just rather be able to test myself whether my design should print, rather than have them send it back to me. Is there any way to test this for free?