Hi all, So i'm a ridiculously prudent person, maybe too much so. I'm about to make a large number of changes, updates and installations to my brand new MBP, including installing Mountain Lion at some point. I was thinking it'd be good to have something like Window's System Restore so you can revert changes to the system if anything goes wrong usability-wise. I have read about time machine and it sounds much like System Restore except you need to allocate a lot of hard drive space. For my current purposes i'm only interested in system changes and modifications and i don't have much in terms of data. Is Time Machine good for this?