Well, I don't think its a good idea to spend all that time on UW assuming you have a lot of free time to prepare. Even if you start from scratch, one block a day is the minimum you can finish while you refer other books to study the material alongwith UW. That will take you maximum 2 months to finish. I am including here the time you would spend using other books to supplement your study. After that, there is no use going over and over it. You already have your notes written down on FA while doing it. Its better to mix another Qbank. Most US med students advise to do that and I think that's a great advice. You play with a variety of questions. You can do a random timed practice with a month UW subscription close to the exam if you want to do it again in some manner. Before that, it would be more helpful to add another Qbank like Kaplan Qbank or Rx. Good luck.