I love those birdies!!! Really cool.
I use Windows, I don't know if this is of interest, I downloaded your botty posed tgd file and of course got the error that I couldn't find the botty. I looked at the internal network. I expected the PFs to plug into colour, translucency, and displacement. What I saw was PFs plugged into colour, reflectivity, and displacement!!!! I wonder if that is a Mac/Windows version issue...