So I'm about to create my Direwolf20 FTB MultiMC instance, and it made me wonder what sort of workflows other people have come up with to update/rebase newer versions of FTB pack releases. Say for example I make the instance, remove a mod or two, add a mod or two, what's the bestest way to get the new files? Just copy and paste? Or do you create a new instance, apply your different mods/configs/saves on top, and go about your business?