I have never gotten a scratch on any film with my Holga 120N and I'm guessing that it is because the first thing I did when I got the thing was to throw away that mask thingy. You may get a little bit more vignetting at close-up but I think that's better than scratches. @ $25 each I'd buy 2 more and maybe one will be worth a darn .... in fact I just ordered my second one reading this thread just for the hellafit ... or in case I drop the one I have again ...