Yes, you can fix your own cat. There are a few things that you need to keep in mind when doing so, however. First and foremost, safety is always the number one priority. Make sure that you have all of the proper safety gear before beginning any repairs. Secondly, be sure to have the correct tools for the job at hand. There is no use trying to repair something if you do not have the right tools for the task. Finally, take your time and be patient. Rushing through a repair job is only going to make things worse in the long run.