I am looking to book the following award... YVR-SFO (~Sept) SFO-FRA-EDI (~Oct) DUB-IAD-SFO (~Oct) The first leg is simply a free one way that I will use for another trip that is over a month away from SFO-FRA-EDI. If I want to book this in economy, I can do this right now, which leads me to my two questions: 1. I would like to change this award from Economy to LH First on SFO-FRA when seats begin to open up the week before the flight. Will this be possible since I already flew the first leg of "this trip" in economy 6 weeks earlier? If so I assume it will be the 37.5k mileage difference and tax difference. 2. What fees will occur when I make this change as a UA Gold or Plat (I might make the latter by then)? Is it $25/$0 for award change fee, or would it be award change fee and close-in award booking fee? Thanks.