nice, I also ordered everything from Rockauto. parts should be here today, trying to find time to do the swap this weekend but the deal breaker may be scheduling an alignment right afterwards. I think the reason for the small brakes is the base models still had 16" wheels. The aviators came with 17" as the smallest option i think.. The current generation explorers smallest wheel size is 18", so they are able to fit the 13.8" rotors... my summer wheels are 20" but I also have a winter set of wheels and tires that are 17", so that's one reason this swap was so appealing to me, should work out great!