I just bought the Willwood Caliper setup for my Legend and I was looking over the rotors during my tear down and was wondering is there any benefit to the aftermarket version of these stock monsters? My plan was to take everything off as a unit and update / replace with new and keep the stock stuff I have as a spare. If swapping out the rotors is something I shouldn't worry about then my next question is what part number can I use to get a second set on hand or what vehicle can I used as a reference for getting a set? Last part of my question is what can I do to the rear brake area as far as a maintenance on my current drums and hardware or even a replacement to have on hand? I have the car tore down to bare frame so everything is easy access. Any help is appreciated!