 So, you don't know how to transfer part of the bones from one rig to another. Not a problem. This is a pretty common question that I get asked all the time, and there aren't that many tutorials that cover this, so before I finished the Crash Course series I really wanted to have this included. Here you can see the free, blender-based body rig that I made for the community a long time ago. Ever since then I've made a lot of improvements to her, and here you can see a newer character I created from her body. One of the biggest differences between the original and the new is the hair, because the new version was designed with anime shading in mind. It has a lot more detail and better weight painting. So let's say we wanted to transfer the hair rig for the new hair to the old body. How would you do that? Well, the first thing I would do is copy the rig with the stuff I want onto the destination file. Then take a second to line them up and make sure that they're parallel. Then select the rig with the new hair, go to edit mode, and select all the bones. Then press P to separate them. Then you can just delete anything left over. Then select the hair bones that you just separated, shift click the new rig, and control J. You're done. You might want to check the names of the bones, because as long as the name of the bones doesn't change, the object should still have all of its old weight paint data. So if we check the hair's armature setting and set it to the new rig, BAM! We don't have to redo any of the weight painting for the transferred bones. Hope that helps. And as always, I hope you have a fantastic day, and I'll see you around.