OK, I know this sounds dumb. The harder I try to cut correctly and evenly I almost always make a "little, tiny" slip. It doesn't look that bad, and even when dry fit, it looks OK. But something happens when I apply the glue and set the piece in place. The misstep I took with the scissors becomes a deep glaring canyon. But now I can't pull the piece off again the model. Besides trying to be more careful, what can be done? TIA.