Unfortunately I didn't have much time for animation this week so nothing to show. But just to give you something, here's David's model I'm using. It's based on the koomer model. Use it as you wish, I don't claim any rights. It is designed for experienced users, there is no separate user friendly interface to customize it, so don't ask me how to use it. If you have already used similar models you will understand everything, if not - you are either a beginner and everything will come a couple of years later or you do not need it.
https://drive.google.com/file/d/1bjc4V4CvUJ0SIkGJq--IUSPx3Z8c-HkS/view?usp=sharing