I just installed a new set of cables on my bike. I used the park cutters. At first my cuts weren't as straight and clean as I anted, but once I learned to bake sure it was aligned correctly and made a quick clean cut, I only needed to use a flat file on a few of them. I made sure they were well opened and round at the ends with a small punch. An uneven cut is no big deal when it happens. Just use the flat file and a punch to make it about a perfect as it can be. It's really not that big of a deal.