IMO this is a big advantage of C1's file structure over "libraries." I can send my tech in Florida a disk with a copy of my files and C1 session folder and he can open it, see all of my adjustments, create a new session with a different name for him using the same folder of images and make his own adjustments separate from mine and send it back to me. He can just email me his session folder settings files (they are small in size), and I can launch his session, point at my originals and see what he did differently than me. Or, any number of us can be shooting the same subject/product/set into capture folders with our own recipes, then send those to our tech to final edit as a single group for the client. IOW, by design, all the historical adjustments reside separately from the raws and can be used or ignored as desired.