i'm going to give you some very useful advice. do not try to hurry when using an exacto knife. do not turn your attention away for even a fraction of a second. if you do, you will slice off the side of your finger and end up having a very painful afternoon. and maybe you only have rubbing alcohol in the house, and no peroxide, so you have to use that to clean the cut, and it burns like you never imagined anything could. and when you go back to the job of cutting an hour later, trying to psych yourself up for it, mustering up as much mental concentration as possible, you find that side tip of your finger laying there, like something out of a horror movie.
please learn this lesson from me.