Hi all - as most of you know I have a 50gb lib in AP3 - it is managed. I have never had the inclination to move to referenced before 2014 when Apple (so far) has not updated AP. So, now I am hedging my bets and learning LR. With this in mind I looked at a few articles on the web about migrating lib's and reviewing the latest version of the AP User Guide. I would like to learn about any particular things I need to be on the lookout for...I have searched the fourm and have not found a lot info on this. And btw, I will be using all the standard safety procedures like doing this from a backup, creating a new version of the AP3 lib, etc. Any best practices are appreciated. Since I am planning on using the one converted lib for Aperture and LR, issues about XMP sidecars and other metadata maintenance and snyc problems I might be on the look out for... Thanks everyone!!