Funny thing, I wasw looking at your make just the other day. I now have my MMU and am redoing some of the files. I'm going to print it in two parts, head and body.
Here is my first test of the head, which is about an inch tall:https://drive.google.com/file/d/1X7lqTWiitQT7PtBweffmPLlJ1GujmnAP/view?usp=sharing
Let me know what you think of it so far.