Currently, you can achieve this by inserting leaf joints into the setup. We’ve done this extensively on our Fortnite characters. However, I do usually add some code with a post script to have it be driven by whatever it needs to be driven by (for example, adding a leaf for a bicep and writing a quick post script to setup that set driven key). Depending on what you’re trying to do, the current twist controls on the arms and legs have all attributes unlocked, so you can rotate, translate, and scale.