Hi I have a few questions I hope someone can help me with. If I have 2 MacBook's (MacBook A and MacBook B, both backed up with Time Machine) and I want to do a clean install of OS X on MacBook B and restore MacBook B with the MacBook A backup, does that mean: i) that the MacBook A and MacBook B are now identical. Is this no issue for Time Machine, as it can distinguish between the 2 devices and therefore makes 2 backups going forward? ii) that the backup of MacBook B before the restoration will not get deleted, as Time Machine does not interpret the restoration as a deletion of files, but rather that the MacBook has not been turned on since the restoration? iii) that going forward there will be 3 Time Machine backups (one of MacBook A, one of MacBook B prior to the restoration and one of the MacBook B after the restoration), and therefore I can always do a restoration of the original MacBook B backup if I wish? Also, when I use Setup Assistant after doing a clean install and restore MacBook B with the MacBook A backup, how much can I customize? Can I choose not to restore documents and images etc?