Long time lurker, first time poster. Can someone explain (or point me to another thread) that describes what happens when you bring in a rMBP for Image Retention? Do they swap out the unit or simply replace the panel? I basically want to know how long I may be out a machine and whether or not I'll have to restore all my files. For those curious, 2012 15inch rMBP 512 2.6gigahertz and of course, an LG panel. I know this has been discussed to death but I wasn't able to find my answer when I did a search. Thanks!